TY  - JOUR
AU  - Jocić, Ana
AU  - Marić, Slađana
AU  - Dimitrijević, Aleksandra
AU  - Tot, Aleksandar
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8835
AB  - This work addresses use of a set of 2-hydroxypropylammonium based protic ionic liquids (PILs) as adjuvants in the aqueous biphasic system (ABS) composed of polyethylene glycol, with molecular weight 2000 g/mol (PEG 2000) and potassium carbonate. The phase diagrams were determined at 25 °C for ABS without and with the addition of 5 wt% of PIL. Comparative analysis of solubility curves indicates that PILs influence liquid-liquid equilibria of PEG 2000-K2CO3 ABS by heightening the hydrophilicity of a PEG-rich phase in various degrees. The compositions of the phases (tie lines) were determined for the selected ABS mixture composition, 26 wt% of PEG 2000 + 10 wt% of K2CO3, without and with 5 wt% of PILs, that is further used for the separation studies. The distribution of PILs between two phases is mainly dependent on specific PEG-PIL interactions and on the PIL content in ABS mixture. The experimental results are supported by molecular simulations that contributed to a broader picture of underlying effects of PILs as adjuvants on ABS formation. The partition of four dye compounds, Remazol Brilliant Blue R (RBBR), Orange II (OII), Rhodamine B (RB) and Congo Red (CR), as probe molecules with different intrinsic properties, was investigated. Obtained results show that the addition of PILs can improve the extraction of hydrophilic and charged compounds as OII, RBBR and CR in PEG-rich phase. On the other hand, it promotes the extraction of hydrophobic and neutral solutes as RB in salt-rich phase. By the addition of the most hydrophilic 3-chloropropanoate based PIL in the PEG 2000-K2CO3 ABS 12 times higher separation factor for OII and RB was achieved. © 2020 Elsevier B.V.
T2  - Journal of Molecular Liquids
T1  - Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system
VL  - 303
SP  - 112484
DO  - 10.1016/j.molliq.2020.112484
ER  - 

@article{
author = "Jocić, Ana and Marić, Slađana and Dimitrijević, Aleksandra and Tot, Aleksandar and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2020",
abstract = "This work addresses use of a set of 2-hydroxypropylammonium based protic ionic liquids (PILs) as adjuvants in the aqueous biphasic system (ABS) composed of polyethylene glycol, with molecular weight 2000 g/mol (PEG 2000) and potassium carbonate. The phase diagrams were determined at 25 °C for ABS without and with the addition of 5 wt% of PIL. Comparative analysis of solubility curves indicates that PILs influence liquid-liquid equilibria of PEG 2000-K2CO3 ABS by heightening the hydrophilicity of a PEG-rich phase in various degrees. The compositions of the phases (tie lines) were determined for the selected ABS mixture composition, 26 wt% of PEG 2000 + 10 wt% of K2CO3, without and with 5 wt% of PILs, that is further used for the separation studies. The distribution of PILs between two phases is mainly dependent on specific PEG-PIL interactions and on the PIL content in ABS mixture. The experimental results are supported by molecular simulations that contributed to a broader picture of underlying effects of PILs as adjuvants on ABS formation. The partition of four dye compounds, Remazol Brilliant Blue R (RBBR), Orange II (OII), Rhodamine B (RB) and Congo Red (CR), as probe molecules with different intrinsic properties, was investigated. Obtained results show that the addition of PILs can improve the extraction of hydrophilic and charged compounds as OII, RBBR and CR in PEG-rich phase. On the other hand, it promotes the extraction of hydrophobic and neutral solutes as RB in salt-rich phase. By the addition of the most hydrophilic 3-chloropropanoate based PIL in the PEG 2000-K2CO3 ABS 12 times higher separation factor for OII and RB was achieved. © 2020 Elsevier B.V.",
journal = "Journal of Molecular Liquids",
title = "Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system",
volume = "303",
pages = "112484",
doi = "10.1016/j.molliq.2020.112484"
}

Jocić, A., Marić, S., Dimitrijević, A., Tot, A., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2020). Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system. in Journal of Molecular Liquids, 303, 112484.
https://doi.org/10.1016/j.molliq.2020.112484

Jocić A, Marić S, Dimitrijević A, Tot A, Gadžurić S, Vraneš M, Trtić-Petrović TM. Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system. in Journal of Molecular Liquids. 2020;303:112484.
doi:10.1016/j.molliq.2020.112484 .

Jocić, Ana, Marić, Slađana, Dimitrijević, Aleksandra, Tot, Aleksandar, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system" in Journal of Molecular Liquids, 303 (2020):112484,
https://doi.org/10.1016/j.molliq.2020.112484 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Мilićević, Jelena
AU  - Jocić, Ana
AU  - Marić, Slađana
AU  - Trtić-Petrović, Tatjana M.
AU  - Papović, Snežana
AU  - Tot, Aleksandar
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8833
AB  - Despite a large collection of publications dealing with the characterization of ionic liquid-based aqueous biphasic systems (IL-ABS), a gap still exists regarding the impact of functionalized alkyl side branches and IL positional isomers on phase equilibria. Therefore, this work addresses the investigation of the ability of different methyl substituted pyridinium based ILs on the formation of ABSs with K3PO4. We evaluated the impact of (i) functional groups (hydroxyl or ether) embed in side alkyl chains of pyridinium cations, (ii) positional isomerism of methyl group (ortho, meta and para) and (iii) the IL cation core. Ternary phase diagrams of the ABSs formed by these ILs and K3PO4 and the appropriate tie lines were determined and presented. It is shown that the presence of functionalized alkyl chain largely affects the salting-in behavior of ILs (ILs with the oxygen groups are more difficult to form ABS) while more subtle differences were observed among positional isomers. Based on the obtained results it is concluded that change of biphasic area of ABS is the manifestation of the altered affinity of ILs for water as a consequence of cation structure. Moreover, aiming at gathering a broader picture of the relationship between ILs structure and ABS properties, molecular simulations were performed, and it was showed that the obtained results are consistent with the experimental results. © 2020 Elsevier B.V.
T2  - Fluid Phase Equilibria
T1  - Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria
VL  - 512
SP  - 112520
DO  - 10.1016/j.fluid.2020.112520
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Мilićević, Jelena and Jocić, Ana and Marić, Slađana and Trtić-Petrović, Tatjana M. and Papović, Snežana and Tot, Aleksandar and Gadžurić, Slobodan and Vraneš, Milan",
year = "2020",
abstract = "Despite a large collection of publications dealing with the characterization of ionic liquid-based aqueous biphasic systems (IL-ABS), a gap still exists regarding the impact of functionalized alkyl side branches and IL positional isomers on phase equilibria. Therefore, this work addresses the investigation of the ability of different methyl substituted pyridinium based ILs on the formation of ABSs with K3PO4. We evaluated the impact of (i) functional groups (hydroxyl or ether) embed in side alkyl chains of pyridinium cations, (ii) positional isomerism of methyl group (ortho, meta and para) and (iii) the IL cation core. Ternary phase diagrams of the ABSs formed by these ILs and K3PO4 and the appropriate tie lines were determined and presented. It is shown that the presence of functionalized alkyl chain largely affects the salting-in behavior of ILs (ILs with the oxygen groups are more difficult to form ABS) while more subtle differences were observed among positional isomers. Based on the obtained results it is concluded that change of biphasic area of ABS is the manifestation of the altered affinity of ILs for water as a consequence of cation structure. Moreover, aiming at gathering a broader picture of the relationship between ILs structure and ABS properties, molecular simulations were performed, and it was showed that the obtained results are consistent with the experimental results. © 2020 Elsevier B.V.",
journal = "Fluid Phase Equilibria",
title = "Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria",
volume = "512",
pages = "112520",
doi = "10.1016/j.fluid.2020.112520"
}

Dimitrijević, A., Мilićević, J., Jocić, A., Marić, S., Trtić-Petrović, T. M., Papović, S., Tot, A., Gadžurić, S.,& Vraneš, M.. (2020). Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria. in Fluid Phase Equilibria, 512, 112520.
https://doi.org/10.1016/j.fluid.2020.112520

Dimitrijević A, Мilićević J, Jocić A, Marić S, Trtić-Petrović TM, Papović S, Tot A, Gadžurić S, Vraneš M. Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria. in Fluid Phase Equilibria. 2020;512:112520.
doi:10.1016/j.fluid.2020.112520 .

Dimitrijević, Aleksandra, Мilićević, Jelena, Jocić, Ana, Marić, Slađana, Trtić-Petrović, Tatjana M., Papović, Snežana, Tot, Aleksandar, Gadžurić, Slobodan, Vraneš, Milan, "Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria" in Fluid Phase Equilibria, 512 (2020):112520,
https://doi.org/10.1016/j.fluid.2020.112520 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Tavares, Ana Paula M.
AU  - Almeida, Mafalda R.
AU  - Vraneš, Milan
AU  - Sousa, Ana C. A.
AU  - Cristovão, Ana Clara
AU  - Trtić-Petrović, Tatjana M.
AU  - Gadžurić, Slobodan
AU  - Freire, Mara G.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8974
AB  - Expired energy drinks are rich in bioactive value-added compounds that can be recovered and reused in order to valorize food waste within a circular economy perspective. However, to accomplish such requirements, it is necessary to develop sustainable extraction and recovery processes, which must consist of decreasing the number of steps required or developing integrated strategies. In this work, novel aqueous biphasic systems (ABS) composed of ionic liquids (ILs) and a biocompatible polymer polypropylene glycol (400 g.mol(-1), PPG 400) were studied for the simultaneous extraction and recovery of three value-added compounds, namely, caffeine, taurine, and niacin, from expired energy drinks. ILs were designed and synthesized in order to have similar anions to the target compounds, thus allowing enhanced selectivity and biological activity, while avoiding an extra step of separation of these high-value compounds from the IL-rich phase. To this end, cholinium-based ILs comprising the anions lactate, pyruvate, taurate, and nicotinate were synthesized, and their cytotoxicity and ecotoxicity credentials were evaluated. Overall, taurine and niacin are majorly enriched in the IL-rich phase, while caffeine preferentially migrates in the majority of the cases toward the PPG-rich phase. However, caffeine also partitions to the IL-rich phase in the ABS formed by cholinium pyruvate or cholinium nicotinate. The ABS formed by cholinium nicotinate and PPG 400 is the best system identified, allowing the almost complete recovery (recovery efficiencies > 82%) of all target compounds into the IL-rich phase in one step. Furthermore, cholinium nicotinate exhibits marginal cytotoxic potential and is harmless from an ecotoxicological point of view. This system is thus a promising platform to simultaneously extract, recover, and reuse value-added compounds from expired energy drinks without the need of removing the IL or recovering the target compounds from the IL-rich phase, thus contributing to a sustainable and circular food economy.
T2  - ACS Sustainable Chemistry and Engineering
T1  - Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems
VL  - 8
IS  - 14
SP  - 5683
EP  - 5692
DO  - 10.1021/acssuschemeng.0c00429
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Tavares, Ana Paula M. and Almeida, Mafalda R. and Vraneš, Milan and Sousa, Ana C. A. and Cristovão, Ana Clara and Trtić-Petrović, Tatjana M. and Gadžurić, Slobodan and Freire, Mara G.",
year = "2020",
abstract = "Expired energy drinks are rich in bioactive value-added compounds that can be recovered and reused in order to valorize food waste within a circular economy perspective. However, to accomplish such requirements, it is necessary to develop sustainable extraction and recovery processes, which must consist of decreasing the number of steps required or developing integrated strategies. In this work, novel aqueous biphasic systems (ABS) composed of ionic liquids (ILs) and a biocompatible polymer polypropylene glycol (400 g.mol(-1), PPG 400) were studied for the simultaneous extraction and recovery of three value-added compounds, namely, caffeine, taurine, and niacin, from expired energy drinks. ILs were designed and synthesized in order to have similar anions to the target compounds, thus allowing enhanced selectivity and biological activity, while avoiding an extra step of separation of these high-value compounds from the IL-rich phase. To this end, cholinium-based ILs comprising the anions lactate, pyruvate, taurate, and nicotinate were synthesized, and their cytotoxicity and ecotoxicity credentials were evaluated. Overall, taurine and niacin are majorly enriched in the IL-rich phase, while caffeine preferentially migrates in the majority of the cases toward the PPG-rich phase. However, caffeine also partitions to the IL-rich phase in the ABS formed by cholinium pyruvate or cholinium nicotinate. The ABS formed by cholinium nicotinate and PPG 400 is the best system identified, allowing the almost complete recovery (recovery efficiencies > 82%) of all target compounds into the IL-rich phase in one step. Furthermore, cholinium nicotinate exhibits marginal cytotoxic potential and is harmless from an ecotoxicological point of view. This system is thus a promising platform to simultaneously extract, recover, and reuse value-added compounds from expired energy drinks without the need of removing the IL or recovering the target compounds from the IL-rich phase, thus contributing to a sustainable and circular food economy.",
journal = "ACS Sustainable Chemistry and Engineering",
title = "Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems",
volume = "8",
number = "14",
pages = "5683-5692",
doi = "10.1021/acssuschemeng.0c00429"
}

Dimitrijević, A., Tavares, A. P. M., Almeida, M. R., Vraneš, M., Sousa, A. C. A., Cristovão, A. C., Trtić-Petrović, T. M., Gadžurić, S.,& Freire, M. G.. (2020). Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems. in ACS Sustainable Chemistry and Engineering, 8(14), 5683-5692.
https://doi.org/10.1021/acssuschemeng.0c00429

Dimitrijević A, Tavares APM, Almeida MR, Vraneš M, Sousa ACA, Cristovão AC, Trtić-Petrović TM, Gadžurić S, Freire MG. Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems. in ACS Sustainable Chemistry and Engineering. 2020;8(14):5683-5692.
doi:10.1021/acssuschemeng.0c00429 .

Dimitrijević, Aleksandra, Tavares, Ana Paula M., Almeida, Mafalda R., Vraneš, Milan, Sousa, Ana C. A., Cristovão, Ana Clara, Trtić-Petrović, Tatjana M., Gadžurić, Slobodan, Freire, Mara G., "Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems" in ACS Sustainable Chemistry and Engineering, 8, no. 14 (2020):5683-5692,
https://doi.org/10.1021/acssuschemeng.0c00429 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Jocić, Ana
AU  - Zec, Nebojša
AU  - Tot, Aleksandar
AU  - Papović, Snežana
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8157
AB  - The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention. © 2019 The Korean Society of Industrial and Engineering Chemistry
T2  - Journal of Industrial and Engineering Chemistry
T1  - Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents
VL  - 76
SP  - 500
EP  - 507
DO  - 10.1016/j.jiec.2019.04.017
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Jocić, Ana and Zec, Nebojša and Tot, Aleksandar and Papović, Snežana and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2019",
abstract = "The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention. © 2019 The Korean Society of Industrial and Engineering Chemistry",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents",
volume = "76",
pages = "500-507",
doi = "10.1016/j.jiec.2019.04.017"
}

Dimitrijević, A., Jocić, A., Zec, N., Tot, A., Papović, S., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2019). Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry, 76, 500-507.
https://doi.org/10.1016/j.jiec.2019.04.017

Dimitrijević A, Jocić A, Zec N, Tot A, Papović S, Gadžurić S, Vraneš M, Trtić-Petrović TM. Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry. 2019;76:500-507.
doi:10.1016/j.jiec.2019.04.017 .

Dimitrijević, Aleksandra, Jocić, Ana, Zec, Nebojša, Tot, Aleksandar, Papović, Snežana, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents" in Journal of Industrial and Engineering Chemistry, 76 (2019):500-507,
https://doi.org/10.1016/j.jiec.2019.04.017 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Jocić, Ana
AU  - Zec, Nebojša
AU  - Tot, Aleksandar
AU  - Papović, Snežana
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8168
AB  - The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention.
T2  - Journal of Industrial and Engineering Chemistry
T1  - Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents
VL  - 76
SP  - 500
EP  - 507
DO  - 10.1016/j.jiec.2019.04.017
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Jocić, Ana and Zec, Nebojša and Tot, Aleksandar and Papović, Snežana and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2019",
abstract = "The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention.",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents",
volume = "76",
pages = "500-507",
doi = "10.1016/j.jiec.2019.04.017"
}

Dimitrijević, A., Jocić, A., Zec, N., Tot, A., Papović, S., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2019). Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry, 76, 500-507.
https://doi.org/10.1016/j.jiec.2019.04.017

Dimitrijević A, Jocić A, Zec N, Tot A, Papović S, Gadžurić S, Vraneš M, Trtić-Petrović TM. Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry. 2019;76:500-507.
doi:10.1016/j.jiec.2019.04.017 .

Dimitrijević, Aleksandra, Jocić, Ana, Zec, Nebojša, Tot, Aleksandar, Papović, Snežana, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents" in Journal of Industrial and Engineering Chemistry, 76 (2019):500-507,
https://doi.org/10.1016/j.jiec.2019.04.017 . .

TY  - JOUR
AU  - Vraneš, Milan
AU  - Panić, Jovana
AU  - Tot, Aleksandar
AU  - Popsavin, Mirjana
AU  - Jocić, Ana
AU  - Gadžurić, Slobodan
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0021961418307808
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7943
AB  - In this paper, physicochemical characterization of newly synthesized choline based ionic liquids with five different chelating anions were examined. The ionic liquids (ILs): cholinium-L-lactate, [Ch][Lac], cholinium-picolinate, [Ch][Pic], cholinium-anthranilate, [Ch][Ant], cholinium-oxyquinolinate, [Ch][oQ], and cholinium-diethylenetriaminepentaacetate, [Ch]3[DTPA], were prepared for the first time and their structures were confirmed by IR and 1H and 13C NMR spectra. Also, thermogravimetric analysis (TGA) was applied to determine their thermal stabilities. Based on the measured density values and viscosity in the temperature range from (293.15 to 323.15) K and calculated values of thermal expansion coefficients and activation energy of viscous flow, as well as of computational simulations, the interactions and structures of the investigated ionic liquids were discussed. © 2018 Elsevier Ltd
T2  - The Journal of Chemical Thermodynamics
T1  - Physicochemical characterization of choline based ionic liquids with chelating anions
VL  - 131
SP  - 80
EP  - 87
DO  - 10.1016/j.jct.2018.10.026
ER  - 

@article{
author = "Vraneš, Milan and Panić, Jovana and Tot, Aleksandar and Popsavin, Mirjana and Jocić, Ana and Gadžurić, Slobodan",
year = "2019",
abstract = "In this paper, physicochemical characterization of newly synthesized choline based ionic liquids with five different chelating anions were examined. The ionic liquids (ILs): cholinium-L-lactate, [Ch][Lac], cholinium-picolinate, [Ch][Pic], cholinium-anthranilate, [Ch][Ant], cholinium-oxyquinolinate, [Ch][oQ], and cholinium-diethylenetriaminepentaacetate, [Ch]3[DTPA], were prepared for the first time and their structures were confirmed by IR and 1H and 13C NMR spectra. Also, thermogravimetric analysis (TGA) was applied to determine their thermal stabilities. Based on the measured density values and viscosity in the temperature range from (293.15 to 323.15) K and calculated values of thermal expansion coefficients and activation energy of viscous flow, as well as of computational simulations, the interactions and structures of the investigated ionic liquids were discussed. © 2018 Elsevier Ltd",
journal = "The Journal of Chemical Thermodynamics",
title = "Physicochemical characterization of choline based ionic liquids with chelating anions",
volume = "131",
pages = "80-87",
doi = "10.1016/j.jct.2018.10.026"
}

Vraneš, M., Panić, J., Tot, A., Popsavin, M., Jocić, A.,& Gadžurić, S.. (2019). Physicochemical characterization of choline based ionic liquids with chelating anions. in The Journal of Chemical Thermodynamics, 131, 80-87.
https://doi.org/10.1016/j.jct.2018.10.026

Vraneš M, Panić J, Tot A, Popsavin M, Jocić A, Gadžurić S. Physicochemical characterization of choline based ionic liquids with chelating anions. in The Journal of Chemical Thermodynamics. 2019;131:80-87.
doi:10.1016/j.jct.2018.10.026 .

Vraneš, Milan, Panić, Jovana, Tot, Aleksandar, Popsavin, Mirjana, Jocić, Ana, Gadžurić, Slobodan, "Physicochemical characterization of choline based ionic liquids with chelating anions" in The Journal of Chemical Thermodynamics, 131 (2019):80-87,
https://doi.org/10.1016/j.jct.2018.10.026 . .

TY  - JOUR
AU  - Zec, Nebojša
AU  - Vraneš, Milan
AU  - Bešter-Rogač, Marija
AU  - Trtić-Petrović, Tatjana M.
AU  - Dimitrijević, Aleksandra
AU  - Čobanov, Isidora
AU  - Gadžurić, Slobodan
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7660
AB  - In this manuscript eight new 1,3-dialkylimidazolium bromide ionic liquids, {[}CnCmim]{[}Br], were synthesized and characterized. Densities of ionic liquids and their diluted aqueous solutions have been measured over the whole composition range at selected temperatures from (293.15 to 323.15) K and at atmospheric pressure (p = 0.1 MPa). Influence of alkyl chain length and cation symmetry on densities and volumetric properties as well as nature of the interactions in aqueous {[}CnCmim]{[}Br] solutions have been discussed and compared with previously published aqueous {[}C(2)C(4)im]{[}Br] system. Densities of pure bromide based ionic liquids decrease with increasing alkyl chain length on imidazolium cation and depend on total number of methyl group in both side alkyl chains. Apparent molar volumes at infinite dilution of investigated ionic liquids in water increase linearly with increase of the total number of the C atoms in the side alkyl chain. (C) 2018 Elsevier Ltd.
T2  - The Journal of Chemical Thermodynamics
T1  - Influence of the alkyl chain length on densities and volumetric properties of 1,3-dialkylimidazolium bromide ionic liquids and their aqueous solutions
VL  - 121
SP  - 72
EP  - 78
DO  - 10.1016/j.jct.2018.02.001
ER  - 

@article{
author = "Zec, Nebojša and Vraneš, Milan and Bešter-Rogač, Marija and Trtić-Petrović, Tatjana M. and Dimitrijević, Aleksandra and Čobanov, Isidora and Gadžurić, Slobodan",
year = "2018",
abstract = "In this manuscript eight new 1,3-dialkylimidazolium bromide ionic liquids, {[}CnCmim]{[}Br], were synthesized and characterized. Densities of ionic liquids and their diluted aqueous solutions have been measured over the whole composition range at selected temperatures from (293.15 to 323.15) K and at atmospheric pressure (p = 0.1 MPa). Influence of alkyl chain length and cation symmetry on densities and volumetric properties as well as nature of the interactions in aqueous {[}CnCmim]{[}Br] solutions have been discussed and compared with previously published aqueous {[}C(2)C(4)im]{[}Br] system. Densities of pure bromide based ionic liquids decrease with increasing alkyl chain length on imidazolium cation and depend on total number of methyl group in both side alkyl chains. Apparent molar volumes at infinite dilution of investigated ionic liquids in water increase linearly with increase of the total number of the C atoms in the side alkyl chain. (C) 2018 Elsevier Ltd.",
journal = "The Journal of Chemical Thermodynamics",
title = "Influence of the alkyl chain length on densities and volumetric properties of 1,3-dialkylimidazolium bromide ionic liquids and their aqueous solutions",
volume = "121",
pages = "72-78",
doi = "10.1016/j.jct.2018.02.001"
}

Zec, N., Vraneš, M., Bešter-Rogač, M., Trtić-Petrović, T. M., Dimitrijević, A., Čobanov, I.,& Gadžurić, S.. (2018). Influence of the alkyl chain length on densities and volumetric properties of 1,3-dialkylimidazolium bromide ionic liquids and their aqueous solutions. in The Journal of Chemical Thermodynamics, 121, 72-78.
https://doi.org/10.1016/j.jct.2018.02.001

Zec N, Vraneš M, Bešter-Rogač M, Trtić-Petrović TM, Dimitrijević A, Čobanov I, Gadžurić S. Influence of the alkyl chain length on densities and volumetric properties of 1,3-dialkylimidazolium bromide ionic liquids and their aqueous solutions. in The Journal of Chemical Thermodynamics. 2018;121:72-78.
doi:10.1016/j.jct.2018.02.001 .

Zec, Nebojša, Vraneš, Milan, Bešter-Rogač, Marija, Trtić-Petrović, Tatjana M., Dimitrijević, Aleksandra, Čobanov, Isidora, Gadžurić, Slobodan, "Influence of the alkyl chain length on densities and volumetric properties of 1,3-dialkylimidazolium bromide ionic liquids and their aqueous solutions" in The Journal of Chemical Thermodynamics, 121 (2018):72-78,
https://doi.org/10.1016/j.jct.2018.02.001 . .

TY  - JOUR
AU  - Trtić-Petrović, Tatjana M.
AU  - Dimitrijević, Aleksandra
AU  - Zdolšek, Nikola
AU  - Đorđević, Jelena S.
AU  - Tot, Aleksandar
AU  - Vraneš, Milan
AU  - Gadžurić, Slobodan
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1891
AB  - In this study, four hydrophilic ionic liquids (ILs) containing 1-alkyl-3-methylimidazolim cation and either salicylate or chloride anions were synthetized and studied as new task-specific ionic liquids (TSILs) suitable for aqueous biphasic system (ABS) formation and selective one-step extraction of copper(II). TSILs are designed so that the anion is responsible for forming the complex with metal(II) and preventing hydrolysis of metal cations at very strong alkaline pH, whereas the cation is responsible for selective extraction of metal(II)-salicylate complexes. It was found that 1-butyl-3-methylimidazolium salicylate could be used for selective extraction of Cu(II) in the presence of Zn(II), Cd(II), and Pb(II) at very alkaline solution without metal hydroxide formation. It was assumed that formation of metal(II)-salicylate complexes prevents the hydrolysis of the metal ions in alkaline solutions. The determined stability constants for Cu(II)-salicylate complexes, where salicylate was derived from different ionic liquids, indicated that there was no significant influence of the cation of the ionic liquid on the stability of the complexes. The ABS based on 1-butyl-3-methylimidazolium salicylate has been applied as the sample preparation step prior to voltammetric determination of Cu(II). The effect of volume of aqueous sample and IL and extraction time were investigated and optimum extraction conditions were determined. The obtained detection limits were 8 ng dm(-3). The optimized method was applied for the determination of Cu(II) in tap water, wastewater, and urine. The study indicated that application of the ABS based on 1-butyl-3-methylimidazolium salicylate ionic liquid could be successfully applied as the sample preparation method for the determination of Cu(II) from various environmental samples.
T2  - Analytical and Bioanalytical Chemistry
T1  - New sample preparation method based on task-specific ionic liquids for extraction and determination of copper in urine and wastewater
VL  - 410
IS  - 1
SP  - 155
EP  - 166
DO  - 10.1007/s00216-017-0705-z
ER  - 

@article{
author = "Trtić-Petrović, Tatjana M. and Dimitrijević, Aleksandra and Zdolšek, Nikola and Đorđević, Jelena S. and Tot, Aleksandar and Vraneš, Milan and Gadžurić, Slobodan",
year = "2018",
abstract = "In this study, four hydrophilic ionic liquids (ILs) containing 1-alkyl-3-methylimidazolim cation and either salicylate or chloride anions were synthetized and studied as new task-specific ionic liquids (TSILs) suitable for aqueous biphasic system (ABS) formation and selective one-step extraction of copper(II). TSILs are designed so that the anion is responsible for forming the complex with metal(II) and preventing hydrolysis of metal cations at very strong alkaline pH, whereas the cation is responsible for selective extraction of metal(II)-salicylate complexes. It was found that 1-butyl-3-methylimidazolium salicylate could be used for selective extraction of Cu(II) in the presence of Zn(II), Cd(II), and Pb(II) at very alkaline solution without metal hydroxide formation. It was assumed that formation of metal(II)-salicylate complexes prevents the hydrolysis of the metal ions in alkaline solutions. The determined stability constants for Cu(II)-salicylate complexes, where salicylate was derived from different ionic liquids, indicated that there was no significant influence of the cation of the ionic liquid on the stability of the complexes. The ABS based on 1-butyl-3-methylimidazolium salicylate has been applied as the sample preparation step prior to voltammetric determination of Cu(II). The effect of volume of aqueous sample and IL and extraction time were investigated and optimum extraction conditions were determined. The obtained detection limits were 8 ng dm(-3). The optimized method was applied for the determination of Cu(II) in tap water, wastewater, and urine. The study indicated that application of the ABS based on 1-butyl-3-methylimidazolium salicylate ionic liquid could be successfully applied as the sample preparation method for the determination of Cu(II) from various environmental samples.",
journal = "Analytical and Bioanalytical Chemistry",
title = "New sample preparation method based on task-specific ionic liquids for extraction and determination of copper in urine and wastewater",
volume = "410",
number = "1",
pages = "155-166",
doi = "10.1007/s00216-017-0705-z"
}

Trtić-Petrović, T. M., Dimitrijević, A., Zdolšek, N., Đorđević, J. S., Tot, A., Vraneš, M.,& Gadžurić, S.. (2018). New sample preparation method based on task-specific ionic liquids for extraction and determination of copper in urine and wastewater. in Analytical and Bioanalytical Chemistry, 410(1), 155-166.
https://doi.org/10.1007/s00216-017-0705-z

Trtić-Petrović TM, Dimitrijević A, Zdolšek N, Đorđević JS, Tot A, Vraneš M, Gadžurić S. New sample preparation method based on task-specific ionic liquids for extraction and determination of copper in urine and wastewater. in Analytical and Bioanalytical Chemistry. 2018;410(1):155-166.
doi:10.1007/s00216-017-0705-z .

Trtić-Petrović, Tatjana M., Dimitrijević, Aleksandra, Zdolšek, Nikola, Đorđević, Jelena S., Tot, Aleksandar, Vraneš, Milan, Gadžurić, Slobodan, "New sample preparation method based on task-specific ionic liquids for extraction and determination of copper in urine and wastewater" in Analytical and Bioanalytical Chemistry, 410, no. 1 (2018):155-166,
https://doi.org/10.1007/s00216-017-0705-z . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Ignjatović, Ljubiša M.
AU  - Tot, Aleksandar
AU  - Vraneš, Milan
AU  - Zec, Nebojša
AU  - Gadžurić, Slobodan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1776
AB  - In this paper we report a simultaneous one-step extraction of five pesticides (acetamiprid, imidaclopride, simazine, linuron and tebufenozide) of different polarity using aqueous biphasic system based on 1-butyl-3(methyl or ethyl) substituted imidazolium or pyrrolidinium ionic liquids with bromide or dicyanamide anion and potassium carbonate as a salting-out agent. Experimentally data obtained for the ternary system (ionic liquid + K2CO3 + H2O) were fitted and correlated by Merchuk equation with satisfactory high correlation factor. The effect of the cation alkyl chain length and the variation of anions of the ionic liquid on the aqueous biphasic system formation and the efficiency of pesticide extraction were investigated. Complete extraction of all studied pesticides was obtained applying aqueous biphasic system based on 1-butyl-3-ethyl imidazolium dicyanamide. It was shown that simultaneous extraction of the different polarity pesticides is achieved in a single-step procedure applying properly tailored ionic liquids in the aqueous biphasic system formulation. In order to explain excellent extraction of the polar pesticides in the studied aqueous biphasic systems, molecular dynamics was applied and the binding energies and non-covalent interactions were calculated. It was found that 1-butyl-3-ethyl imidazolium dicyanamide achieves the strongest interactions with the polar pesticides (acetamiprid and imidaclopride) leading to the highest partition coefficients. It was shown that combination of experimental and computational approach can be successfully applied for the selection and design of suitable ionic liquids for efficient extraction of various polarity pesticides using simple aqueous biphasic ionic liquid based systems. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Journal of Molecular Liquids
T1  - Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids
VL  - 243
SP  - 646
EP  - 653
DO  - 10.1016/j.molliq.2017.08.077
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Ignjatović, Ljubiša M. and Tot, Aleksandar and Vraneš, Milan and Zec, Nebojša and Gadžurić, Slobodan and Trtić-Petrović, Tatjana M.",
year = "2017",
abstract = "In this paper we report a simultaneous one-step extraction of five pesticides (acetamiprid, imidaclopride, simazine, linuron and tebufenozide) of different polarity using aqueous biphasic system based on 1-butyl-3(methyl or ethyl) substituted imidazolium or pyrrolidinium ionic liquids with bromide or dicyanamide anion and potassium carbonate as a salting-out agent. Experimentally data obtained for the ternary system (ionic liquid + K2CO3 + H2O) were fitted and correlated by Merchuk equation with satisfactory high correlation factor. The effect of the cation alkyl chain length and the variation of anions of the ionic liquid on the aqueous biphasic system formation and the efficiency of pesticide extraction were investigated. Complete extraction of all studied pesticides was obtained applying aqueous biphasic system based on 1-butyl-3-ethyl imidazolium dicyanamide. It was shown that simultaneous extraction of the different polarity pesticides is achieved in a single-step procedure applying properly tailored ionic liquids in the aqueous biphasic system formulation. In order to explain excellent extraction of the polar pesticides in the studied aqueous biphasic systems, molecular dynamics was applied and the binding energies and non-covalent interactions were calculated. It was found that 1-butyl-3-ethyl imidazolium dicyanamide achieves the strongest interactions with the polar pesticides (acetamiprid and imidaclopride) leading to the highest partition coefficients. It was shown that combination of experimental and computational approach can be successfully applied for the selection and design of suitable ionic liquids for efficient extraction of various polarity pesticides using simple aqueous biphasic ionic liquid based systems. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Journal of Molecular Liquids",
title = "Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids",
volume = "243",
pages = "646-653",
doi = "10.1016/j.molliq.2017.08.077"
}

Dimitrijević, A., Ignjatović, L. M., Tot, A., Vraneš, M., Zec, N., Gadžurić, S.,& Trtić-Petrović, T. M.. (2017). Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids. in Journal of Molecular Liquids, 243, 646-653.
https://doi.org/10.1016/j.molliq.2017.08.077

Dimitrijević A, Ignjatović LM, Tot A, Vraneš M, Zec N, Gadžurić S, Trtić-Petrović TM. Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids. in Journal of Molecular Liquids. 2017;243:646-653.
doi:10.1016/j.molliq.2017.08.077 .

Dimitrijević, Aleksandra, Ignjatović, Ljubiša M., Tot, Aleksandar, Vraneš, Milan, Zec, Nebojša, Gadžurić, Slobodan, Trtić-Petrović, Tatjana M., "Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids" in Journal of Molecular Liquids, 243 (2017):646-653,
https://doi.org/10.1016/j.molliq.2017.08.077 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Trtić-Petrović, Tatjana M.
AU  - Vraneš, Milan
AU  - Papović, Snežana
AU  - Tot, Aleksandar
AU  - Dožić, Sanja
AU  - Gadžurić, Slobodan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/899
AB  - In this work, novel phase diagrams for aqueous solutions of 1-alkyl-3-methylimidazolium- and 1-butyl-3-ethylimidazolium-based ILs combined with phosphate-based salts, namely, K3PO4 or K2HPO4, are reported and discussed. To correlate the binodal data, the Merchuk equation is applied. The tie lines and tie-line lengths are also presented. The anion influence on the ability to form aqueous biphasic system (ABS) is investigated for the IL with the same1-butyl-3-methylimidazolium cation, [bmim](+), and various anions, for example, salicylate, [SAL](-); trifluoromethanesulfonate, [TFS](-); dicyanamide, [DCA](-); and chloride, [Cl](-). The order of studied anions to form ABS is [TFS](-) GT [SAL](-) GT [DCA](-) GT [Cl](-). The effect of alkyl chain length on imidazolium ion on liquidliquid equilibrium is discussed in terms of increasing ionic liquid hydrophobicity and poorer affinity for water. It is shown that 1-hexyl-3-methylimidazolium chloride ionic liquid has a better ability to form ABS comparing to ionic liquid with butyl chain and the same anion. Newly synthesized ionic-liquid-containing ethyl group 1-butyl-3-ethylimidazolium bromide was also investigated, showing the influence of both ethyl group and bromide anion on the ability of ABS formation.
T2  - Journal of Chemical and Engineering Data
T1  - Liquid-Liquid Equilibria in Aqueous 1-Alkyl-3-methylimidazolium- and 1-Butyl-3-ethylimidazolium-Based Ionic Liquids
VL  - 61
IS  - 1
SP  - 549
EP  - 555
DO  - 10.1021/acs.jced.5b00697
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Trtić-Petrović, Tatjana M. and Vraneš, Milan and Papović, Snežana and Tot, Aleksandar and Dožić, Sanja and Gadžurić, Slobodan",
year = "2016",
abstract = "In this work, novel phase diagrams for aqueous solutions of 1-alkyl-3-methylimidazolium- and 1-butyl-3-ethylimidazolium-based ILs combined with phosphate-based salts, namely, K3PO4 or K2HPO4, are reported and discussed. To correlate the binodal data, the Merchuk equation is applied. The tie lines and tie-line lengths are also presented. The anion influence on the ability to form aqueous biphasic system (ABS) is investigated for the IL with the same1-butyl-3-methylimidazolium cation, [bmim](+), and various anions, for example, salicylate, [SAL](-); trifluoromethanesulfonate, [TFS](-); dicyanamide, [DCA](-); and chloride, [Cl](-). The order of studied anions to form ABS is [TFS](-) GT [SAL](-) GT [DCA](-) GT [Cl](-). The effect of alkyl chain length on imidazolium ion on liquidliquid equilibrium is discussed in terms of increasing ionic liquid hydrophobicity and poorer affinity for water. It is shown that 1-hexyl-3-methylimidazolium chloride ionic liquid has a better ability to form ABS comparing to ionic liquid with butyl chain and the same anion. Newly synthesized ionic-liquid-containing ethyl group 1-butyl-3-ethylimidazolium bromide was also investigated, showing the influence of both ethyl group and bromide anion on the ability of ABS formation.",
journal = "Journal of Chemical and Engineering Data",
title = "Liquid-Liquid Equilibria in Aqueous 1-Alkyl-3-methylimidazolium- and 1-Butyl-3-ethylimidazolium-Based Ionic Liquids",
volume = "61",
number = "1",
pages = "549-555",
doi = "10.1021/acs.jced.5b00697"
}

Dimitrijević, A., Trtić-Petrović, T. M., Vraneš, M., Papović, S., Tot, A., Dožić, S.,& Gadžurić, S.. (2016). Liquid-Liquid Equilibria in Aqueous 1-Alkyl-3-methylimidazolium- and 1-Butyl-3-ethylimidazolium-Based Ionic Liquids. in Journal of Chemical and Engineering Data, 61(1), 549-555.
https://doi.org/10.1021/acs.jced.5b00697

Dimitrijević A, Trtić-Petrović TM, Vraneš M, Papović S, Tot A, Dožić S, Gadžurić S. Liquid-Liquid Equilibria in Aqueous 1-Alkyl-3-methylimidazolium- and 1-Butyl-3-ethylimidazolium-Based Ionic Liquids. in Journal of Chemical and Engineering Data. 2016;61(1):549-555.
doi:10.1021/acs.jced.5b00697 .

Dimitrijević, Aleksandra, Trtić-Petrović, Tatjana M., Vraneš, Milan, Papović, Snežana, Tot, Aleksandar, Dožić, Sanja, Gadžurić, Slobodan, "Liquid-Liquid Equilibria in Aqueous 1-Alkyl-3-methylimidazolium- and 1-Butyl-3-ethylimidazolium-Based Ionic Liquids" in Journal of Chemical and Engineering Data, 61, no. 1 (2016):549-555,
https://doi.org/10.1021/acs.jced.5b00697 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Zec, Nebojša
AU  - Zdolšek, Nikola
AU  - Dožić, Sanja
AU  - Tot, Aleksandar
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1213
AB  - In this work three 1-alkyl-3-ethylimidazolium bromide ionic liquids (alkyl = ethyl, hexyl and octyl) were synthesized applying both, conventional and microwave assisted synthetic paths. The phase diagrams for aqueous solutions of 1-alkyl-3-ethylimidazolium bromide ionic liquids as novel extractants combined with phosphate-based salts are reported and discussed in terms of aqueous biphasic system (ABS) formation. Merchuk equation was applied in order to correlate the,experimental binodal data. The liquid-liquid equilibrium data (tie-line compositions and tie-line length) were also experimentally determined by a gravimetric method. The influence of the alkyl chain length on ABS formation ability was investigated. It was found that ability to form ABS increases with the increase of the alkyl chain length on the imidazolium cation. Also, it was found that ionic liquids with ethyl group in the N-3 position better form ABS compared to those with methyl substituent. This was discussed in terms of increasing ionic liquid hydrophobicity and poor affinity for water. In order to better understand the impact of the alkyl side chain of the imidazolium ion and the efficiency of ABS formation, computer simulations were performed using investigated ionic liquids with the ethyl group in the position N-3 of the cation and different alkyl substituents in the position N-1. Also, extraction of selected organic dyes was performed to demonstrate application of studied ionic liquids as novel extractants. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
T2  - Journal of Industrial and Engineering Chemistry
T1  - Aqueous biphasic system formation using 1-alkyl-3-ethylimidazolium bromide ionic liquids as new extractants
VL  - 40
SP  - 152
EP  - 160
DO  - 10.1016/j.jiec.2016.06.017
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Zec, Nebojša and Zdolšek, Nikola and Dožić, Sanja and Tot, Aleksandar and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2016",
abstract = "In this work three 1-alkyl-3-ethylimidazolium bromide ionic liquids (alkyl = ethyl, hexyl and octyl) were synthesized applying both, conventional and microwave assisted synthetic paths. The phase diagrams for aqueous solutions of 1-alkyl-3-ethylimidazolium bromide ionic liquids as novel extractants combined with phosphate-based salts are reported and discussed in terms of aqueous biphasic system (ABS) formation. Merchuk equation was applied in order to correlate the,experimental binodal data. The liquid-liquid equilibrium data (tie-line compositions and tie-line length) were also experimentally determined by a gravimetric method. The influence of the alkyl chain length on ABS formation ability was investigated. It was found that ability to form ABS increases with the increase of the alkyl chain length on the imidazolium cation. Also, it was found that ionic liquids with ethyl group in the N-3 position better form ABS compared to those with methyl substituent. This was discussed in terms of increasing ionic liquid hydrophobicity and poor affinity for water. In order to better understand the impact of the alkyl side chain of the imidazolium ion and the efficiency of ABS formation, computer simulations were performed using investigated ionic liquids with the ethyl group in the position N-3 of the cation and different alkyl substituents in the position N-1. Also, extraction of selected organic dyes was performed to demonstrate application of studied ionic liquids as novel extractants. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Aqueous biphasic system formation using 1-alkyl-3-ethylimidazolium bromide ionic liquids as new extractants",
volume = "40",
pages = "152-160",
doi = "10.1016/j.jiec.2016.06.017"
}

Dimitrijević, A., Zec, N., Zdolšek, N., Dožić, S., Tot, A., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2016). Aqueous biphasic system formation using 1-alkyl-3-ethylimidazolium bromide ionic liquids as new extractants. in Journal of Industrial and Engineering Chemistry, 40, 152-160.
https://doi.org/10.1016/j.jiec.2016.06.017

Dimitrijević A, Zec N, Zdolšek N, Dožić S, Tot A, Gadžurić S, Vraneš M, Trtić-Petrović TM. Aqueous biphasic system formation using 1-alkyl-3-ethylimidazolium bromide ionic liquids as new extractants. in Journal of Industrial and Engineering Chemistry. 2016;40:152-160.
doi:10.1016/j.jiec.2016.06.017 .

Dimitrijević, Aleksandra, Zec, Nebojša, Zdolšek, Nikola, Dožić, Sanja, Tot, Aleksandar, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Aqueous biphasic system formation using 1-alkyl-3-ethylimidazolium bromide ionic liquids as new extractants" in Journal of Industrial and Engineering Chemistry, 40 (2016):152-160,
https://doi.org/10.1016/j.jiec.2016.06.017 . .

TY  - JOUR
AU  - Đorđević, Jelena S.
AU  - Papp, Zsigmond
AU  - Guzsvany, Valeria
AU  - Svancara, Ivan
AU  - Trtić-Petrović, Tatjana M.
AU  - Purenović, Milovan M.
AU  - Vytras, Karel
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4660
AB  - This paper summarises the results of voltammetric studies on the herbicide 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (Linuron), using a carbon paste electrode containing tricresyl phosphate (TCP-CPE) as liquid binder. The principal experimental conditions, such as the pH effect, investigated in Britton-Robinson buffer solutions (pH 2.0-7.0), the peak characteristics for the analyte of interest, or instrumental parameters for the differential pulse voltammetric mode were optimized for the method. As found out, the best electroanalytical performance of the TCP-CPE was achieved at pH 2.0, whereby the oxidation peak of Linuron appeared at ca. + 1.3 V vs. SCE. The analytical procedure developed offers good linearity in the concentration range of 1.25-44.20 mu g mL(-1) (1.77 x 10(-4)-5.05 x 10(-6) mol L-1), showing-for the first time-the applicability of the TCP-CPE for anodic oxidations in direct voltammetry (without accumulation). The method was then verified by determining Linuron in a spiked river water sample and a commercial formulation and the results obtained agreed well with those obtained by the reference HPLC/UV determination.
T2  - Sensors
T1  - Voltammetric Determination of the Herbicide Linuron Using a Tricresyl Phosphate-Based Carbon Paste Electrode
VL  - 12
IS  - 1
SP  - 148
EP  - 161
DO  - 10.3390/s120100148
ER  - 

@article{
author = "Đorđević, Jelena S. and Papp, Zsigmond and Guzsvany, Valeria and Svancara, Ivan and Trtić-Petrović, Tatjana M. and Purenović, Milovan M. and Vytras, Karel",
year = "2012",
abstract = "This paper summarises the results of voltammetric studies on the herbicide 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (Linuron), using a carbon paste electrode containing tricresyl phosphate (TCP-CPE) as liquid binder. The principal experimental conditions, such as the pH effect, investigated in Britton-Robinson buffer solutions (pH 2.0-7.0), the peak characteristics for the analyte of interest, or instrumental parameters for the differential pulse voltammetric mode were optimized for the method. As found out, the best electroanalytical performance of the TCP-CPE was achieved at pH 2.0, whereby the oxidation peak of Linuron appeared at ca. + 1.3 V vs. SCE. The analytical procedure developed offers good linearity in the concentration range of 1.25-44.20 mu g mL(-1) (1.77 x 10(-4)-5.05 x 10(-6) mol L-1), showing-for the first time-the applicability of the TCP-CPE for anodic oxidations in direct voltammetry (without accumulation). The method was then verified by determining Linuron in a spiked river water sample and a commercial formulation and the results obtained agreed well with those obtained by the reference HPLC/UV determination.",
journal = "Sensors",
title = "Voltammetric Determination of the Herbicide Linuron Using a Tricresyl Phosphate-Based Carbon Paste Electrode",
volume = "12",
number = "1",
pages = "148-161",
doi = "10.3390/s120100148"
}

Đorđević, J. S., Papp, Z., Guzsvany, V., Svancara, I., Trtić-Petrović, T. M., Purenović, M. M.,& Vytras, K.. (2012). Voltammetric Determination of the Herbicide Linuron Using a Tricresyl Phosphate-Based Carbon Paste Electrode. in Sensors, 12(1), 148-161.
https://doi.org/10.3390/s120100148

Đorđević JS, Papp Z, Guzsvany V, Svancara I, Trtić-Petrović TM, Purenović MM, Vytras K. Voltammetric Determination of the Herbicide Linuron Using a Tricresyl Phosphate-Based Carbon Paste Electrode. in Sensors. 2012;12(1):148-161.
doi:10.3390/s120100148 .

Đorđević, Jelena S., Papp, Zsigmond, Guzsvany, Valeria, Svancara, Ivan, Trtić-Petrović, Tatjana M., Purenović, Milovan M., Vytras, Karel, "Voltammetric Determination of the Herbicide Linuron Using a Tricresyl Phosphate-Based Carbon Paste Electrode" in Sensors, 12, no. 1 (2012):148-161,
https://doi.org/10.3390/s120100148 . .

TY  - JOUR
AU  - Ashrafi, Amir M.
AU  - Đorđević, Jelena S.
AU  - Guzsvany, Valeria
AU  - Svancara, Ivan
AU  - Trtić-Petrović, Tatjana M.
AU  - Purenović, Milovan M.
AU  - Vytras, Karel
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5235
AB  - In this study, a carbon paste electrode based on tricresyl phosphate (TCP-CPE) as a binder has been applied to the voltammetric characterization and determination of Carbendazim fungicide (methyl-1H-benzimidazol-2-yl-carbamate, MBC). The pH effect (in Britton-Robinson buffers, pH 2.0-8.0), as well as the presence of 2-hydroxypropyl-beta-cyclodextrin (HPCD) on the electrochemical behavior of MBC were investigated. In the potential range of interest, the oxidation signal was observed with the overall shape strongly dependent upon pH and exhibiting the most favorable signal-to-noise ratio in mild acidic solutions (pH 4.0). This has indicated that also protons are involved in the electrode transformation of MBC. Furthermore, it was confirmed that addition of 3.6.10(-5) mol L-1 HPCD significantly enhanced the sensitivity towards the target analyte. The experimental conditions optimised for the determination of MBC in the differential pulse adsorptive stripping voltammetric mode (DPAdSV) were as follows: initial potential, -0.10 V vs. Ag/AgCl; final potential, +1.30 V; accumulation potential, -0.35 V; accumulation time, 120 s, and the scan rate, 100 mV s(-1). The method developed offers linearity in the concentration range of 5.0 .10(-7) - 1.0.10(-5) mol L-1 MBC, with r = 0.995 and the limit of detection of about 3.0.10(-7) mol L-1. In a model sample of spiked river water, the recovery rate achieved was 101.9 % (at the concentrations from 1.0.10(-6) to 3.0.10(-6) mol L-1 MBC), suggesting one that the procedure can be applied in analysis of real samples.
T2  - International Journal of Electrochemical Science
T1  - Trace Determination of Carbendazim Fungicide Using Adsorptive Stripping Voltammetry with a Carbon Paste Electrode Containing Tricresyl Phosphate
VL  - 7
IS  - 10
SP  - 9717
EP  - 9731
UR  - https://hdl.handle.net/21.15107/rcub_vinar_5235
ER  - 

@article{
author = "Ashrafi, Amir M. and Đorđević, Jelena S. and Guzsvany, Valeria and Svancara, Ivan and Trtić-Petrović, Tatjana M. and Purenović, Milovan M. and Vytras, Karel",
year = "2012",
abstract = "In this study, a carbon paste electrode based on tricresyl phosphate (TCP-CPE) as a binder has been applied to the voltammetric characterization and determination of Carbendazim fungicide (methyl-1H-benzimidazol-2-yl-carbamate, MBC). The pH effect (in Britton-Robinson buffers, pH 2.0-8.0), as well as the presence of 2-hydroxypropyl-beta-cyclodextrin (HPCD) on the electrochemical behavior of MBC were investigated. In the potential range of interest, the oxidation signal was observed with the overall shape strongly dependent upon pH and exhibiting the most favorable signal-to-noise ratio in mild acidic solutions (pH 4.0). This has indicated that also protons are involved in the electrode transformation of MBC. Furthermore, it was confirmed that addition of 3.6.10(-5) mol L-1 HPCD significantly enhanced the sensitivity towards the target analyte. The experimental conditions optimised for the determination of MBC in the differential pulse adsorptive stripping voltammetric mode (DPAdSV) were as follows: initial potential, -0.10 V vs. Ag/AgCl; final potential, +1.30 V; accumulation potential, -0.35 V; accumulation time, 120 s, and the scan rate, 100 mV s(-1). The method developed offers linearity in the concentration range of 5.0 .10(-7) - 1.0.10(-5) mol L-1 MBC, with r = 0.995 and the limit of detection of about 3.0.10(-7) mol L-1. In a model sample of spiked river water, the recovery rate achieved was 101.9 % (at the concentrations from 1.0.10(-6) to 3.0.10(-6) mol L-1 MBC), suggesting one that the procedure can be applied in analysis of real samples.",
journal = "International Journal of Electrochemical Science",
title = "Trace Determination of Carbendazim Fungicide Using Adsorptive Stripping Voltammetry with a Carbon Paste Electrode Containing Tricresyl Phosphate",
volume = "7",
number = "10",
pages = "9717-9731",
url = "https://hdl.handle.net/21.15107/rcub_vinar_5235"
}

Ashrafi, A. M., Đorđević, J. S., Guzsvany, V., Svancara, I., Trtić-Petrović, T. M., Purenović, M. M.,& Vytras, K.. (2012). Trace Determination of Carbendazim Fungicide Using Adsorptive Stripping Voltammetry with a Carbon Paste Electrode Containing Tricresyl Phosphate. in International Journal of Electrochemical Science, 7(10), 9717-9731.
https://hdl.handle.net/21.15107/rcub_vinar_5235

Ashrafi AM, Đorđević JS, Guzsvany V, Svancara I, Trtić-Petrović TM, Purenović MM, Vytras K. Trace Determination of Carbendazim Fungicide Using Adsorptive Stripping Voltammetry with a Carbon Paste Electrode Containing Tricresyl Phosphate. in International Journal of Electrochemical Science. 2012;7(10):9717-9731.
https://hdl.handle.net/21.15107/rcub_vinar_5235 .

Ashrafi, Amir M., Đorđević, Jelena S., Guzsvany, Valeria, Svancara, Ivan, Trtić-Petrović, Tatjana M., Purenović, Milovan M., Vytras, Karel, "Trace Determination of Carbendazim Fungicide Using Adsorptive Stripping Voltammetry with a Carbon Paste Electrode Containing Tricresyl Phosphate" in International Journal of Electrochemical Science, 7, no. 10 (2012):9717-9731,
https://hdl.handle.net/21.15107/rcub_vinar_5235 .