TY  - JOUR
AU  - Laban, Bojana B.
AU  - Vodnik, Vesna
AU  - Dramićanin, Miroslav
AU  - Novaković, Mirjana M.
AU  - Bibić, Nataša M.
AU  - Sovilj, Sofija P.
AU  - Vasić, Vesna M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/155
AB  - The aim of the present work was to elucidate the binding mechanism and kinetics of anionic cyanine dye 3,3-disulfopropyl-5,5-dichlorothiacyanine sodium salt (TC) J-aggregation on the surface of silver nanoparticles (AgNPs, particle size similar to 6 nm). The hybrid J-aggregateAgNPs assembly was characterized by TEM analysis, UVvis spectrophotometry, and fluorescence measurements. In the elucidation of TC binding on the surface of AgNPs, they were considered as macromolecules with several binding sites and TC dye was considered as a ligand. Scatchard and Hill analysis revealed that TC binding was a random process rather than cooperative, with similar to 200 bonded TC molecules per AgNP and a binding constant K-a = 4.8 x 10(7) M. The TC-AgNP assembly exerted concentration-dependent fluorescence quenching properties. The linearity of the SternVolmer relation, accounting for both static and dynamic quenching, indicated that only one type of quenching occurred, suggesting that AgNPs quenched the fluorescence of TC with an extraordinarily high SternVolmer constant (KSV) in the range of 10(8) M-1. Additionally, the kinetics of J-aggregation of TC in the presence of AgNPs was studied using a stopped flow technique. Kinetic measurements were performed as a function of the TC and AgNP concentration, yielding sigmoidal kinetic curves. The concentration dependence of the parameters of the kinetic curves indicated that J-aggregate formation on the AgNP surface occurred via a two-step process; the first was adsorption of the initial dye layer, followed by the growth of consecutive layers.
T2  - Journal of Physical Chemistry. C
T1  - Mechanism and Kinetics of J-Aggregation of Thiacyanine Dye in the Presence of Silver Nanoparticles
VL  - 118
IS  - 40
SP  - 23393
EP  - 23401
DO  - 10.1021/jp507086g
ER  - 

@article{
author = "Laban, Bojana B. and Vodnik, Vesna and Dramićanin, Miroslav and Novaković, Mirjana M. and Bibić, Nataša M. and Sovilj, Sofija P. and Vasić, Vesna M.",
year = "2014",
abstract = "The aim of the present work was to elucidate the binding mechanism and kinetics of anionic cyanine dye 3,3-disulfopropyl-5,5-dichlorothiacyanine sodium salt (TC) J-aggregation on the surface of silver nanoparticles (AgNPs, particle size similar to 6 nm). The hybrid J-aggregateAgNPs assembly was characterized by TEM analysis, UVvis spectrophotometry, and fluorescence measurements. In the elucidation of TC binding on the surface of AgNPs, they were considered as macromolecules with several binding sites and TC dye was considered as a ligand. Scatchard and Hill analysis revealed that TC binding was a random process rather than cooperative, with similar to 200 bonded TC molecules per AgNP and a binding constant K-a = 4.8 x 10(7) M. The TC-AgNP assembly exerted concentration-dependent fluorescence quenching properties. The linearity of the SternVolmer relation, accounting for both static and dynamic quenching, indicated that only one type of quenching occurred, suggesting that AgNPs quenched the fluorescence of TC with an extraordinarily high SternVolmer constant (KSV) in the range of 10(8) M-1. Additionally, the kinetics of J-aggregation of TC in the presence of AgNPs was studied using a stopped flow technique. Kinetic measurements were performed as a function of the TC and AgNP concentration, yielding sigmoidal kinetic curves. The concentration dependence of the parameters of the kinetic curves indicated that J-aggregate formation on the AgNP surface occurred via a two-step process; the first was adsorption of the initial dye layer, followed by the growth of consecutive layers.",
journal = "Journal of Physical Chemistry. C",
title = "Mechanism and Kinetics of J-Aggregation of Thiacyanine Dye in the Presence of Silver Nanoparticles",
volume = "118",
number = "40",
pages = "23393-23401",
doi = "10.1021/jp507086g"
}

Laban, B. B., Vodnik, V., Dramićanin, M., Novaković, M. M., Bibić, N. M., Sovilj, S. P.,& Vasić, V. M.. (2014). Mechanism and Kinetics of J-Aggregation of Thiacyanine Dye in the Presence of Silver Nanoparticles. in Journal of Physical Chemistry. C, 118(40), 23393-23401.
https://doi.org/10.1021/jp507086g

Laban BB, Vodnik V, Dramićanin M, Novaković MM, Bibić NM, Sovilj SP, Vasić VM. Mechanism and Kinetics of J-Aggregation of Thiacyanine Dye in the Presence of Silver Nanoparticles. in Journal of Physical Chemistry. C. 2014;118(40):23393-23401.
doi:10.1021/jp507086g .

Laban, Bojana B., Vodnik, Vesna, Dramićanin, Miroslav, Novaković, Mirjana M., Bibić, Nataša M., Sovilj, Sofija P., Vasić, Vesna M., "Mechanism and Kinetics of J-Aggregation of Thiacyanine Dye in the Presence of Silver Nanoparticles" in Journal of Physical Chemistry. C, 118, no. 40 (2014):23393-23401,
https://doi.org/10.1021/jp507086g . .

TY  - JOUR
AU  - Laban, Bojana B.
AU  - Vodnik, Vesna
AU  - Vujačić, Ana V.
AU  - Sovilj, Sofija P.
AU  - Jokic, A. B.
AU  - Vasić, Vesna M.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5751
AB  - The aim of this work was to investigate the formation of J-aggregates of thiacyanine dye (TC, 5,5-disulfopropyl-3,3-dichlorothiacyanine sodium salt) in the presence of 6 nm spherical silver nanoparticles (Ag NPs) using spectrophotometric and fluorescence methods. The formation of J-aggregates was concentration dependent and characterized by the appearance of the new absorption band with the maximum at 481 nm. Spectrophotometric study of J-aggregate formation and time stability suggested that they were formed on the account of monomer form of TC. Moreover, the stability of J-aggregates increased with the lowering AgNPs concentration. The measurements of fluorescence of the NPs-dye assembly clearly indicated that the fluorescence of TC was quenched by Ag NPs on the concentration dependent manner. The spectrophotometric and fluorescence properties of NPs-dye assembly were found to be quantitatively related to the surface coverage of the dye on the Ag NPs.
T2  - Russian Journal of Physical Chemistry A
T1  - Spectroscopic and fluorescence properties of silver-dye composite nanoparticles
VL  - 87
IS  - 13
SP  - 2219
EP  - 2224
DO  - 10.1134/S0036024413130141
ER  - 

@article{
author = "Laban, Bojana B. and Vodnik, Vesna and Vujačić, Ana V. and Sovilj, Sofija P. and Jokic, A. B. and Vasić, Vesna M.",
year = "2013",
abstract = "The aim of this work was to investigate the formation of J-aggregates of thiacyanine dye (TC, 5,5-disulfopropyl-3,3-dichlorothiacyanine sodium salt) in the presence of 6 nm spherical silver nanoparticles (Ag NPs) using spectrophotometric and fluorescence methods. The formation of J-aggregates was concentration dependent and characterized by the appearance of the new absorption band with the maximum at 481 nm. Spectrophotometric study of J-aggregate formation and time stability suggested that they were formed on the account of monomer form of TC. Moreover, the stability of J-aggregates increased with the lowering AgNPs concentration. The measurements of fluorescence of the NPs-dye assembly clearly indicated that the fluorescence of TC was quenched by Ag NPs on the concentration dependent manner. The spectrophotometric and fluorescence properties of NPs-dye assembly were found to be quantitatively related to the surface coverage of the dye on the Ag NPs.",
journal = "Russian Journal of Physical Chemistry A",
title = "Spectroscopic and fluorescence properties of silver-dye composite nanoparticles",
volume = "87",
number = "13",
pages = "2219-2224",
doi = "10.1134/S0036024413130141"
}

Laban, B. B., Vodnik, V., Vujačić, A. V., Sovilj, S. P., Jokic, A. B.,& Vasić, V. M.. (2013). Spectroscopic and fluorescence properties of silver-dye composite nanoparticles. in Russian Journal of Physical Chemistry A, 87(13), 2219-2224.
https://doi.org/10.1134/S0036024413130141

Laban BB, Vodnik V, Vujačić AV, Sovilj SP, Jokic AB, Vasić VM. Spectroscopic and fluorescence properties of silver-dye composite nanoparticles. in Russian Journal of Physical Chemistry A. 2013;87(13):2219-2224.
doi:10.1134/S0036024413130141 .

Laban, Bojana B., Vodnik, Vesna, Vujačić, Ana V., Sovilj, Sofija P., Jokic, A. B., Vasić, Vesna M., "Spectroscopic and fluorescence properties of silver-dye composite nanoparticles" in Russian Journal of Physical Chemistry A, 87, no. 13 (2013):2219-2224,
https://doi.org/10.1134/S0036024413130141 . .

TY  - JOUR
AU  - Vujačić, Ana V.
AU  - Vasić, Vesna M.
AU  - Dramićanin, Miroslav
AU  - Sovilj, Sofija P.
AU  - Bibić, Nataša M.
AU  - Milonjić, Slobodan K.
AU  - Vodnik, Vesna
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5408
AB  - Nanoparticles (NPs) modified with fluorescent cyanine dyes can exhibit fluorescent quenching properties due to energy and/or electron transfer, and these systems have many applications in catalysis, drug delivery, nanoelectronics, medical diagnostics, and chemical sensing. The aim of this work was to investigate the adsorption of cyanine dye 5,5-disulfopropyl-3,3-dichlorothiacyanine (TC) on the surface of citrate capped gold nanoparticles (AuNPs) with the average core sizes of 9, 17, and 30 nm using various experimental techniques. The measurements of fluorescence corrected for inner filter effects (IFE) of the particle dye assembly clearly indicated that the fluorescence of TC was quenched by AuNPs on the concentration dependent 3 manner, and the equilibrium constants for the sorption of TC on the NP surface were calculated. Significant increase of fluorescence quenching was noticed when NP size increased, keeping the concentration of NPs of different size constant. By comparing experimental and calculated results for quenching of TC dye fluorescence, we assumed that the maximum quenching was restricted to full monolayer coverage of TC on the NP surface. The conclusion was drawn that the most probable orientation of TC dye molecules on the NP surface was slanted and that the dye approached NP surface with its positively charged thiazole ring.
T2  - Journal of Physical Chemistry. C
T1  - Fluorescence Quenching of 5,5 -Disulfopropyl-3,3 -dichlorothiacyanine Dye Adsorbed on Gold Nanoparticles
VL  - 117
IS  - 13
SP  - 6567
EP  - 6577
DO  - 10.1021/jp311015w
ER  - 

@article{
author = "Vujačić, Ana V. and Vasić, Vesna M. and Dramićanin, Miroslav and Sovilj, Sofija P. and Bibić, Nataša M. and Milonjić, Slobodan K. and Vodnik, Vesna",
year = "2013",
abstract = "Nanoparticles (NPs) modified with fluorescent cyanine dyes can exhibit fluorescent quenching properties due to energy and/or electron transfer, and these systems have many applications in catalysis, drug delivery, nanoelectronics, medical diagnostics, and chemical sensing. The aim of this work was to investigate the adsorption of cyanine dye 5,5-disulfopropyl-3,3-dichlorothiacyanine (TC) on the surface of citrate capped gold nanoparticles (AuNPs) with the average core sizes of 9, 17, and 30 nm using various experimental techniques. The measurements of fluorescence corrected for inner filter effects (IFE) of the particle dye assembly clearly indicated that the fluorescence of TC was quenched by AuNPs on the concentration dependent 3 manner, and the equilibrium constants for the sorption of TC on the NP surface were calculated. Significant increase of fluorescence quenching was noticed when NP size increased, keeping the concentration of NPs of different size constant. By comparing experimental and calculated results for quenching of TC dye fluorescence, we assumed that the maximum quenching was restricted to full monolayer coverage of TC on the NP surface. The conclusion was drawn that the most probable orientation of TC dye molecules on the NP surface was slanted and that the dye approached NP surface with its positively charged thiazole ring.",
journal = "Journal of Physical Chemistry. C",
title = "Fluorescence Quenching of 5,5 -Disulfopropyl-3,3 -dichlorothiacyanine Dye Adsorbed on Gold Nanoparticles",
volume = "117",
number = "13",
pages = "6567-6577",
doi = "10.1021/jp311015w"
}

Vujačić, A. V., Vasić, V. M., Dramićanin, M., Sovilj, S. P., Bibić, N. M., Milonjić, S. K.,& Vodnik, V.. (2013). Fluorescence Quenching of 5,5 -Disulfopropyl-3,3 -dichlorothiacyanine Dye Adsorbed on Gold Nanoparticles. in Journal of Physical Chemistry. C, 117(13), 6567-6577.
https://doi.org/10.1021/jp311015w

Vujačić AV, Vasić VM, Dramićanin M, Sovilj SP, Bibić NM, Milonjić SK, Vodnik V. Fluorescence Quenching of 5,5 -Disulfopropyl-3,3 -dichlorothiacyanine Dye Adsorbed on Gold Nanoparticles. in Journal of Physical Chemistry. C. 2013;117(13):6567-6577.
doi:10.1021/jp311015w .

Vujačić, Ana V., Vasić, Vesna M., Dramićanin, Miroslav, Sovilj, Sofija P., Bibić, Nataša M., Milonjić, Slobodan K., Vodnik, Vesna, "Fluorescence Quenching of 5,5 -Disulfopropyl-3,3 -dichlorothiacyanine Dye Adsorbed on Gold Nanoparticles" in Journal of Physical Chemistry. C, 117, no. 13 (2013):6567-6577,
https://doi.org/10.1021/jp311015w . .

TY  - JOUR
AU  - Vujačić, Ana V.
AU  - Vodnik, Vesna
AU  - Sovilj, Sofija P.
AU  - Dramićanin, Miroslav
AU  - Bibić, Nataša M.
AU  - Milonjić, Slobodan K.
AU  - Vasić, Vesna M.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5308
AB  - The aim of the work was to investigate the adsorption of negatively charged cyanine dye 5,5-disulfopropyl-3,3-dichlorothiacyanine (TC) on the surface of borate capped gold nanoparticles (AuNPs) with average core sizes of 6 and 10 nm. The characterization of AuNPs in the presence and absence of TC was performed by measurements of the absorption, fluorescence and Raman spectra, TEM, DLS and zeta potential. The measurements of fluorescence of the NPs-TC assembly in the presence of low TC concentration clearly indicated that the fluorescence of TC was quenched by AuNPs in the concentration dependent manner. This process was found to be quantitatively related to the surface coverage of AuNPs by TC molecules. NPs surface coverage by TC was obtained from the dependence of TC fluorescence on NPs or TC concentration, keeping the concentration of one of the components of the NPs-TC assembly constant. The calculated values were obtained under the assumption that the monolayer of TC molecules, which were in direct contact with the NPs surface, was adsorbed. The experimentally obtained values were in accordance with the calculated ones for TC orientation along the vertical short side. The formation of TC J-aggregates was evident only in the presence of 6 nm NPs, when TC concentration was high. In this case the experimentally obtained value for C6 concentration needed to completely quench TC dyes fluorescence was much lower than the calculated, indicating that the dye was accommodated on the surface of these NPs in more than one layer, and most probably in the slanted configuration.
T2  - New Journal of Chemistry
T1  - Adsorption and fluorescence quenching of 5,5 -disulfopropyl-3,3 -dichlorothiacyanine dye on gold nanoparticles
VL  - 37
IS  - 3
SP  - 743
EP  - 751
DO  - 10.1039/c2nj40865a
ER  - 

@article{
author = "Vujačić, Ana V. and Vodnik, Vesna and Sovilj, Sofija P. and Dramićanin, Miroslav and Bibić, Nataša M. and Milonjić, Slobodan K. and Vasić, Vesna M.",
year = "2013",
abstract = "The aim of the work was to investigate the adsorption of negatively charged cyanine dye 5,5-disulfopropyl-3,3-dichlorothiacyanine (TC) on the surface of borate capped gold nanoparticles (AuNPs) with average core sizes of 6 and 10 nm. The characterization of AuNPs in the presence and absence of TC was performed by measurements of the absorption, fluorescence and Raman spectra, TEM, DLS and zeta potential. The measurements of fluorescence of the NPs-TC assembly in the presence of low TC concentration clearly indicated that the fluorescence of TC was quenched by AuNPs in the concentration dependent manner. This process was found to be quantitatively related to the surface coverage of AuNPs by TC molecules. NPs surface coverage by TC was obtained from the dependence of TC fluorescence on NPs or TC concentration, keeping the concentration of one of the components of the NPs-TC assembly constant. The calculated values were obtained under the assumption that the monolayer of TC molecules, which were in direct contact with the NPs surface, was adsorbed. The experimentally obtained values were in accordance with the calculated ones for TC orientation along the vertical short side. The formation of TC J-aggregates was evident only in the presence of 6 nm NPs, when TC concentration was high. In this case the experimentally obtained value for C6 concentration needed to completely quench TC dyes fluorescence was much lower than the calculated, indicating that the dye was accommodated on the surface of these NPs in more than one layer, and most probably in the slanted configuration.",
journal = "New Journal of Chemistry",
title = "Adsorption and fluorescence quenching of 5,5 -disulfopropyl-3,3 -dichlorothiacyanine dye on gold nanoparticles",
volume = "37",
number = "3",
pages = "743-751",
doi = "10.1039/c2nj40865a"
}

Vujačić, A. V., Vodnik, V., Sovilj, S. P., Dramićanin, M., Bibić, N. M., Milonjić, S. K.,& Vasić, V. M.. (2013). Adsorption and fluorescence quenching of 5,5 -disulfopropyl-3,3 -dichlorothiacyanine dye on gold nanoparticles. in New Journal of Chemistry, 37(3), 743-751.
https://doi.org/10.1039/c2nj40865a

Vujačić AV, Vodnik V, Sovilj SP, Dramićanin M, Bibić NM, Milonjić SK, Vasić VM. Adsorption and fluorescence quenching of 5,5 -disulfopropyl-3,3 -dichlorothiacyanine dye on gold nanoparticles. in New Journal of Chemistry. 2013;37(3):743-751.
doi:10.1039/c2nj40865a .

Vujačić, Ana V., Vodnik, Vesna, Sovilj, Sofija P., Dramićanin, Miroslav, Bibić, Nataša M., Milonjić, Slobodan K., Vasić, Vesna M., "Adsorption and fluorescence quenching of 5,5 -disulfopropyl-3,3 -dichlorothiacyanine dye on gold nanoparticles" in New Journal of Chemistry, 37, no. 3 (2013):743-751,
https://doi.org/10.1039/c2nj40865a . .

TY  - JOUR
AU  - Vujačić, Ana V.
AU  - Vasić, Vesna M.
AU  - Dramićanin, Miroslav
AU  - Sovilj, Sofija P.
AU  - Bibić, Nataša M.
AU  - Hranisavljevic, Jasmina
AU  - Wiederrecht, Gary P.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4727
AB  - The kinetics of J-aggregate assembly on the surface of noble metal nanoparticle colloids are described, providing new mechanistic insight into the interaction of the dye molecules with the surface of metal nanoparticles. We specifically studied the J-aggregation of a thiacyanine dye (TC, 3,3-disulfopropyl-5,5-dichlorothiacyanine sodium salt) on the surface of gold nanopartide colloids. The hybrid J-aggregate Au colloidal dispersions were characterized by UV vis spectrophotometry, fluorescence measurements, zeta potential measurements, and TEM analysis. Kinetic measurements were carried out using a stopped-flow method, indicating that the J-aggregate formation on the surface occurs via a two-step process. The first step includes adsorption of the initial dye layer, followed by an order of magnitude slower growth of consecutive layers. Activation parameters determined from the fluorescence measurements yielded further details about the nature of the interaction.
T2  - Journal of Physical Chemistry. C
T1  - Kinetics of J-Aggregate Formation on the Surface of Au Nanoparticle Colloids
VL  - 116
IS  - 7
SP  - 4655
EP  - 4661
DO  - 10.1021/jp210549u
ER  - 

@article{
author = "Vujačić, Ana V. and Vasić, Vesna M. and Dramićanin, Miroslav and Sovilj, Sofija P. and Bibić, Nataša M. and Hranisavljevic, Jasmina and Wiederrecht, Gary P.",
year = "2012",
abstract = "The kinetics of J-aggregate assembly on the surface of noble metal nanoparticle colloids are described, providing new mechanistic insight into the interaction of the dye molecules with the surface of metal nanoparticles. We specifically studied the J-aggregation of a thiacyanine dye (TC, 3,3-disulfopropyl-5,5-dichlorothiacyanine sodium salt) on the surface of gold nanopartide colloids. The hybrid J-aggregate Au colloidal dispersions were characterized by UV vis spectrophotometry, fluorescence measurements, zeta potential measurements, and TEM analysis. Kinetic measurements were carried out using a stopped-flow method, indicating that the J-aggregate formation on the surface occurs via a two-step process. The first step includes adsorption of the initial dye layer, followed by an order of magnitude slower growth of consecutive layers. Activation parameters determined from the fluorescence measurements yielded further details about the nature of the interaction.",
journal = "Journal of Physical Chemistry. C",
title = "Kinetics of J-Aggregate Formation on the Surface of Au Nanoparticle Colloids",
volume = "116",
number = "7",
pages = "4655-4661",
doi = "10.1021/jp210549u"
}

Vujačić, A. V., Vasić, V. M., Dramićanin, M., Sovilj, S. P., Bibić, N. M., Hranisavljevic, J.,& Wiederrecht, G. P.. (2012). Kinetics of J-Aggregate Formation on the Surface of Au Nanoparticle Colloids. in Journal of Physical Chemistry. C, 116(7), 4655-4661.
https://doi.org/10.1021/jp210549u

Vujačić AV, Vasić VM, Dramićanin M, Sovilj SP, Bibić NM, Hranisavljevic J, Wiederrecht GP. Kinetics of J-Aggregate Formation on the Surface of Au Nanoparticle Colloids. in Journal of Physical Chemistry. C. 2012;116(7):4655-4661.
doi:10.1021/jp210549u .

Vujačić, Ana V., Vasić, Vesna M., Dramićanin, Miroslav, Sovilj, Sofija P., Bibić, Nataša M., Hranisavljevic, Jasmina, Wiederrecht, Gary P., "Kinetics of J-Aggregate Formation on the Surface of Au Nanoparticle Colloids" in Journal of Physical Chemistry. C, 116, no. 7 (2012):4655-4661,
https://doi.org/10.1021/jp210549u . .

TY  - CONF
AU  - Vujačić, Ana V.
AU  - Vasić, Vesna M.
AU  - Dramićanin, Miroslav
AU  - Sovilj, Sofija P.
AU  - Bibić, Nataša M.
AU  - Milonjić, Slobodan K.
AU  - Hranisavljević, Jasmina
AU  - Wiederrecht, Gary P.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9345
AB  - The kinetics of J-aggregation of thiacyanine dye (TC, 5,5’–disulfopropyl 3,3’–
dichlorothiacyanine sodium salt) was studied in the presence of gold colloid. The
synthesized Au colloidal dispersions were characterized by UV-Vis
spectrophotometry. Kinetic measurements were carried out using a stopped-flow
method to study the mechanism of J-aggregation, capturing both the slow and the
fast phases of J-aggregate formation.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry
T1  - Kinetics of J-aggregation of Tc-coated au colloidal nanoparticles in aqueous solution
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9345
ER  - 

@conference{
author = "Vujačić, Ana V. and Vasić, Vesna M. and Dramićanin, Miroslav and Sovilj, Sofija P. and Bibić, Nataša M. and Milonjić, Slobodan K. and Hranisavljević, Jasmina and Wiederrecht, Gary P.",
year = "2010",
abstract = "The kinetics of J-aggregation of thiacyanine dye (TC, 5,5’–disulfopropyl 3,3’–
dichlorothiacyanine sodium salt) was studied in the presence of gold colloid. The
synthesized Au colloidal dispersions were characterized by UV-Vis
spectrophotometry. Kinetic measurements were carried out using a stopped-flow
method to study the mechanism of J-aggregation, capturing both the slow and the
fast phases of J-aggregate formation.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry",
title = "Kinetics of J-aggregation of Tc-coated au colloidal nanoparticles in aqueous solution",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9345"
}

Vujačić, A. V., Vasić, V. M., Dramićanin, M., Sovilj, S. P., Bibić, N. M., Milonjić, S. K., Hranisavljević, J.,& Wiederrecht, G. P.. (2010). Kinetics of J-aggregation of Tc-coated au colloidal nanoparticles in aqueous solution. in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia..
https://hdl.handle.net/21.15107/rcub_vinar_9345

Vujačić AV, Vasić VM, Dramićanin M, Sovilj SP, Bibić NM, Milonjić SK, Hranisavljević J, Wiederrecht GP. Kinetics of J-aggregation of Tc-coated au colloidal nanoparticles in aqueous solution. in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry. 2010;.
https://hdl.handle.net/21.15107/rcub_vinar_9345 .

Vujačić, Ana V., Vasić, Vesna M., Dramićanin, Miroslav, Sovilj, Sofija P., Bibić, Nataša M., Milonjić, Slobodan K., Hranisavljević, Jasmina, Wiederrecht, Gary P., "Kinetics of J-aggregation of Tc-coated au colloidal nanoparticles in aqueous solution" in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry (2010),
https://hdl.handle.net/21.15107/rcub_vinar_9345 .

TY  - JOUR
AU  - Vujačić, Ana V.
AU  - Savić, Jasmina
AU  - Sovilj, Sofija P.
AU  - Szecsenyi, K. Meszaros
AU  - Todorović, N.
AU  - Petković, Marijana
AU  - Vasić, Vesna M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3653
AB  - The kinetics of the reaction between the tetrachloroaurate(III) ion and L-methionine (L-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(L-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(L-Met). This is an intermolecular process, involving attack on the [AuCl4](-) Complex by an outer-sphere L-methionine. The activation parameters (Delta H-not equal and Delta S-not equal) for substitution and reduction were determined. IR spectroscopy indicates that L-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while H-1 and C-13 NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resulting complex. (C) 2008 Elsevier Ltd. All rights reserved.
T2  - Polyhedron
T1  - Mechanism of complex formation between [AuCl4](-) and L-methionine
VL  - 28
IS  - 3
SP  - 593
EP  - 599
DO  - 10.1016/j.poly.2008.11.045
ER  - 

@article{
author = "Vujačić, Ana V. and Savić, Jasmina and Sovilj, Sofija P. and Szecsenyi, K. Meszaros and Todorović, N. and Petković, Marijana and Vasić, Vesna M.",
year = "2009",
abstract = "The kinetics of the reaction between the tetrachloroaurate(III) ion and L-methionine (L-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(L-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(L-Met). This is an intermolecular process, involving attack on the [AuCl4](-) Complex by an outer-sphere L-methionine. The activation parameters (Delta H-not equal and Delta S-not equal) for substitution and reduction were determined. IR spectroscopy indicates that L-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while H-1 and C-13 NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resulting complex. (C) 2008 Elsevier Ltd. All rights reserved.",
journal = "Polyhedron",
title = "Mechanism of complex formation between [AuCl4](-) and L-methionine",
volume = "28",
number = "3",
pages = "593-599",
doi = "10.1016/j.poly.2008.11.045"
}

Vujačić, A. V., Savić, J., Sovilj, S. P., Szecsenyi, K. M., Todorović, N., Petković, M.,& Vasić, V. M.. (2009). Mechanism of complex formation between [AuCl4](-) and L-methionine. in Polyhedron, 28(3), 593-599.
https://doi.org/10.1016/j.poly.2008.11.045

Vujačić AV, Savić J, Sovilj SP, Szecsenyi KM, Todorović N, Petković M, Vasić VM. Mechanism of complex formation between [AuCl4](-) and L-methionine. in Polyhedron. 2009;28(3):593-599.
doi:10.1016/j.poly.2008.11.045 .

Vujačić, Ana V., Savić, Jasmina, Sovilj, Sofija P., Szecsenyi, K. Meszaros, Todorović, N., Petković, Marijana, Vasić, Vesna M., "Mechanism of complex formation between [AuCl4](-) and L-methionine" in Polyhedron, 28, no. 3 (2009):593-599,
https://doi.org/10.1016/j.poly.2008.11.045 . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Vasić, Vesna M.
AU  - Stojić, Dragica Lj.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3443
AB  - The influence of cationic surfactant hexadecyltrimethylammonium bromide (CTAB) on the kinetics of the spontaneous reduction of the analytically important compound, sodium hexanitrocobaltate(III), was studied. The spontaneous reduction was monitored spectrophotometrically at pH 2 and 5 and at concentrations of CTAB from 1 x 10(-5) to 5 x 10(-4) M. The mechanism of this process was described using two consecutive first-order reactions. A decrease in the rate constant for reduction at pH 5 in solutions containing CTAB in concentrations of 5.6 x 10(-5) M (critical micelle concentration) compared with its rate in an aqueous solution was observed. These effects could be explained by electrostatic and hydrophobic/hydrophilic interactions between the micellar pseudophase and the hexanitrocobaltate(III) ion.
T2  - Russian Journal of Physical Chemistry A
T1  - The reduction of hexanitrocobaltate(III) ion in the presence of hexadecyltrimethylammonium bromide
VL  - 82
IS  - 5
SP  - 709
EP  - 712
DO  - 10.1134/S0036024408050038
ER  - 

@article{
author = "Sovilj, Sofija P. and Vasić, Vesna M. and Stojić, Dragica Lj.",
year = "2008",
abstract = "The influence of cationic surfactant hexadecyltrimethylammonium bromide (CTAB) on the kinetics of the spontaneous reduction of the analytically important compound, sodium hexanitrocobaltate(III), was studied. The spontaneous reduction was monitored spectrophotometrically at pH 2 and 5 and at concentrations of CTAB from 1 x 10(-5) to 5 x 10(-4) M. The mechanism of this process was described using two consecutive first-order reactions. A decrease in the rate constant for reduction at pH 5 in solutions containing CTAB in concentrations of 5.6 x 10(-5) M (critical micelle concentration) compared with its rate in an aqueous solution was observed. These effects could be explained by electrostatic and hydrophobic/hydrophilic interactions between the micellar pseudophase and the hexanitrocobaltate(III) ion.",
journal = "Russian Journal of Physical Chemistry A",
title = "The reduction of hexanitrocobaltate(III) ion in the presence of hexadecyltrimethylammonium bromide",
volume = "82",
number = "5",
pages = "709-712",
doi = "10.1134/S0036024408050038"
}

Sovilj, S. P., Vasić, V. M.,& Stojić, D. Lj.. (2008). The reduction of hexanitrocobaltate(III) ion in the presence of hexadecyltrimethylammonium bromide. in Russian Journal of Physical Chemistry A, 82(5), 709-712.
https://doi.org/10.1134/S0036024408050038

Sovilj SP, Vasić VM, Stojić DL. The reduction of hexanitrocobaltate(III) ion in the presence of hexadecyltrimethylammonium bromide. in Russian Journal of Physical Chemistry A. 2008;82(5):709-712.
doi:10.1134/S0036024408050038 .

Sovilj, Sofija P., Vasić, Vesna M., Stojić, Dragica Lj., "The reduction of hexanitrocobaltate(III) ion in the presence of hexadecyltrimethylammonium bromide" in Russian Journal of Physical Chemistry A, 82, no. 5 (2008):709-712,
https://doi.org/10.1134/S0036024408050038 . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Drakulić, Branko J.
AU  - Stojić, Dragica Lj.
AU  - Katsaros, N.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6614
AB  - A huge variety of nano-objects, allowing specific reactions at well-defined positions can be generated using oxo-molybdenurn compounds based building blocks and fragments. On the other side, the use of suphur-based interfaces as metal-based organic materials is a new area with many potential applications in medicine, particularly as implants. In that respect, as precursors for building new materials with pronounced characteristics five new dioxomolybdenum(VI) complexes of the general formula [MoO2(RdtC)(2)] have been used in the present work. Their predicted geometries optimized by the MO calculations are in excellent agreement with the reported crystal structure data, and therefore can be used as models for docking study between complexes and biomolecules. In silico screening for complex-protein interaction will be able to predict behavior of such materials implanted in living systems.
T2  - Materials Science Forum
T1  - Molecular modeling of new dioxomolybdenum(VI) complexes with heteroalicyclic dithiocarbamates. In silico models for metal-implant coating within living systems
VL  - 518
SP  - 411
EP  - 416
DO  - 10.4028/www.scientific.net/MSF.518.411
ER  - 

@article{
author = "Sovilj, Sofija P. and Drakulić, Branko J. and Stojić, Dragica Lj. and Katsaros, N.",
year = "2006",
abstract = "A huge variety of nano-objects, allowing specific reactions at well-defined positions can be generated using oxo-molybdenurn compounds based building blocks and fragments. On the other side, the use of suphur-based interfaces as metal-based organic materials is a new area with many potential applications in medicine, particularly as implants. In that respect, as precursors for building new materials with pronounced characteristics five new dioxomolybdenum(VI) complexes of the general formula [MoO2(RdtC)(2)] have been used in the present work. Their predicted geometries optimized by the MO calculations are in excellent agreement with the reported crystal structure data, and therefore can be used as models for docking study between complexes and biomolecules. In silico screening for complex-protein interaction will be able to predict behavior of such materials implanted in living systems.",
journal = "Materials Science Forum",
title = "Molecular modeling of new dioxomolybdenum(VI) complexes with heteroalicyclic dithiocarbamates. In silico models for metal-implant coating within living systems",
volume = "518",
pages = "411-416",
doi = "10.4028/www.scientific.net/MSF.518.411"
}

Sovilj, S. P., Drakulić, B. J., Stojić, D. Lj.,& Katsaros, N.. (2006). Molecular modeling of new dioxomolybdenum(VI) complexes with heteroalicyclic dithiocarbamates. In silico models for metal-implant coating within living systems. in Materials Science Forum, 518, 411-416.
https://doi.org/10.4028/www.scientific.net/MSF.518.411

Sovilj SP, Drakulić BJ, Stojić DL, Katsaros N. Molecular modeling of new dioxomolybdenum(VI) complexes with heteroalicyclic dithiocarbamates. In silico models for metal-implant coating within living systems. in Materials Science Forum. 2006;518:411-416.
doi:10.4028/www.scientific.net/MSF.518.411 .

Sovilj, Sofija P., Drakulić, Branko J., Stojić, Dragica Lj., Katsaros, N., "Molecular modeling of new dioxomolybdenum(VI) complexes with heteroalicyclic dithiocarbamates. In silico models for metal-implant coating within living systems" in Materials Science Forum, 518 (2006):411-416,
https://doi.org/10.4028/www.scientific.net/MSF.518.411 . .

TY  - JOUR
AU  - Brceski, ID
AU  - Leovac, Vukadin M.
AU  - Bogdanović, Goran A.
AU  - Sovilj, Sofija P.
AU  - Revenco, M
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2709
AB  - The syntheses of a new ligand 2-(diphenylphosphino)benzaldehyde selenosemicarbazone (HL) and the corresponding complex with Ni(II) of the formula [Ni(L)(NCS)] are reported. The complex was characterized by single crystal X-ray analysis. The compound complex is diamagnetic and has a markedly deformed square-planar structure with PNSe set of donor atoms of the ligand, the Schiff base monoanion, and the N atom of the coordinated NCS group. The phosphorus atom deviates even by 0.494(3) Angstrom from the mean plane defined by the other coordination atoms (NSeN) and the metal atom. (C) 2003 Published by Elsevier B.V.
T2  - Inorganic Chemistry Communications
T1  - Synthesis, physicochemical properties and crystal structure of isothiocianato [2-(diphenylphosphino)benzaldehyde selenosemicarbazonato(1(-))] nickel(II)
VL  - 7
IS  - 2
SP  - 253
EP  - 256
DO  - 10.1016/j.inoche.2003.11.013
ER  - 

@article{
author = "Brceski, ID and Leovac, Vukadin M. and Bogdanović, Goran A. and Sovilj, Sofija P. and Revenco, M",
year = "2004",
abstract = "The syntheses of a new ligand 2-(diphenylphosphino)benzaldehyde selenosemicarbazone (HL) and the corresponding complex with Ni(II) of the formula [Ni(L)(NCS)] are reported. The complex was characterized by single crystal X-ray analysis. The compound complex is diamagnetic and has a markedly deformed square-planar structure with PNSe set of donor atoms of the ligand, the Schiff base monoanion, and the N atom of the coordinated NCS group. The phosphorus atom deviates even by 0.494(3) Angstrom from the mean plane defined by the other coordination atoms (NSeN) and the metal atom. (C) 2003 Published by Elsevier B.V.",
journal = "Inorganic Chemistry Communications",
title = "Synthesis, physicochemical properties and crystal structure of isothiocianato [2-(diphenylphosphino)benzaldehyde selenosemicarbazonato(1(-))] nickel(II)",
volume = "7",
number = "2",
pages = "253-256",
doi = "10.1016/j.inoche.2003.11.013"
}

Brceski, I., Leovac, V. M., Bogdanović, G. A., Sovilj, S. P.,& Revenco, M.. (2004). Synthesis, physicochemical properties and crystal structure of isothiocianato [2-(diphenylphosphino)benzaldehyde selenosemicarbazonato(1(-))] nickel(II). in Inorganic Chemistry Communications, 7(2), 253-256.
https://doi.org/10.1016/j.inoche.2003.11.013

Brceski I, Leovac VM, Bogdanović GA, Sovilj SP, Revenco M. Synthesis, physicochemical properties and crystal structure of isothiocianato [2-(diphenylphosphino)benzaldehyde selenosemicarbazonato(1(-))] nickel(II). in Inorganic Chemistry Communications. 2004;7(2):253-256.
doi:10.1016/j.inoche.2003.11.013 .

Brceski, ID, Leovac, Vukadin M., Bogdanović, Goran A., Sovilj, Sofija P., Revenco, M, "Synthesis, physicochemical properties and crystal structure of isothiocianato [2-(diphenylphosphino)benzaldehyde selenosemicarbazonato(1(-))] nickel(II)" in Inorganic Chemistry Communications, 7, no. 2 (2004):253-256,
https://doi.org/10.1016/j.inoche.2003.11.013 . .

TY  - JOUR
AU  - Kusigerski, Vladan
AU  - Spasojević, Vojislav
AU  - Lazarov, Nenad Đ.
AU  - Markovic, DS
AU  - Matić, Vladimir M.
AU  - Sovilj, Sofija P.
AU  - Guillot, M
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2627
AB  - Magnetic properties of the dinuclear cobalt complex [Co-2(ox)tpmc](ClO4)(2).3H(2)O have been studied from the magnetization data obtained in the high magnetic field-low temperature experiment (B less than or equal to 20 T, T = 4.2 K). An excellent agreement between experimental and calculated data was achieved within the framework of the isolated Ising Co(H) pairs in the ground state, where each cobalt ion from the pair was situated in a differently distorted octahedral environment (asymmetric dimer). The obtained values for g-factors, g(a) = (4.5 +/- 0.1) and g(b) = (3.3 +/- 0.1), and for the intracluster exchange integral J = (-16.0 +/- 0.5) K confirm both the previous results on the crystal structure of the complex under consideration and the assumption on the strong antiferromagnetic coupling between cobalt ions realized by the superexchange interaction over the asymmetric oxalato bridge. (C) 2003 Published by Elsevier Science Ltd.
T2  - Solid State Communications
T1  - High magnetic fields study of asymmetric Co(II) dimer in octahedral ligand environment
VL  - 126
IS  - 6
SP  - 319
EP  - 322
DO  - 10.1016/S0038-1098(03)00163-7
ER  - 

@article{
author = "Kusigerski, Vladan and Spasojević, Vojislav and Lazarov, Nenad Đ. and Markovic, DS and Matić, Vladimir M. and Sovilj, Sofija P. and Guillot, M",
year = "2003",
abstract = "Magnetic properties of the dinuclear cobalt complex [Co-2(ox)tpmc](ClO4)(2).3H(2)O have been studied from the magnetization data obtained in the high magnetic field-low temperature experiment (B less than or equal to 20 T, T = 4.2 K). An excellent agreement between experimental and calculated data was achieved within the framework of the isolated Ising Co(H) pairs in the ground state, where each cobalt ion from the pair was situated in a differently distorted octahedral environment (asymmetric dimer). The obtained values for g-factors, g(a) = (4.5 +/- 0.1) and g(b) = (3.3 +/- 0.1), and for the intracluster exchange integral J = (-16.0 +/- 0.5) K confirm both the previous results on the crystal structure of the complex under consideration and the assumption on the strong antiferromagnetic coupling between cobalt ions realized by the superexchange interaction over the asymmetric oxalato bridge. (C) 2003 Published by Elsevier Science Ltd.",
journal = "Solid State Communications",
title = "High magnetic fields study of asymmetric Co(II) dimer in octahedral ligand environment",
volume = "126",
number = "6",
pages = "319-322",
doi = "10.1016/S0038-1098(03)00163-7"
}

Kusigerski, V., Spasojević, V., Lazarov, N. Đ., Markovic, D., Matić, V. M., Sovilj, S. P.,& Guillot, M.. (2003). High magnetic fields study of asymmetric Co(II) dimer in octahedral ligand environment. in Solid State Communications, 126(6), 319-322.
https://doi.org/10.1016/S0038-1098(03)00163-7

Kusigerski V, Spasojević V, Lazarov NĐ, Markovic D, Matić VM, Sovilj SP, Guillot M. High magnetic fields study of asymmetric Co(II) dimer in octahedral ligand environment. in Solid State Communications. 2003;126(6):319-322.
doi:10.1016/S0038-1098(03)00163-7 .

Kusigerski, Vladan, Spasojević, Vojislav, Lazarov, Nenad Đ., Markovic, DS, Matić, Vladimir M., Sovilj, Sofija P., Guillot, M, "High magnetic fields study of asymmetric Co(II) dimer in octahedral ligand environment" in Solid State Communications, 126, no. 6 (2003):319-322,
https://doi.org/10.1016/S0038-1098(03)00163-7 . .

TY  - JOUR
AU  - Stojić, Dragica Lj.
AU  - Marčeta Kaninski, Milica
AU  - Sovilj, Sofija P.
AU  - Miljanić, Šćepan S.
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6365
AB  - Hydrogen production via electrolysis of water from alkaline aqueous electrolytes is a well-established conventional technology. However, due to high energy requirements of about 4.5-5 kWh/m(n)(3) H-2 in most industrial electrolysers, the cost of hydrogen produced in such a way is n high. This is a limiting factor for the use of this method on a large scale, except in countries where the electricity is very cheap. There were various attempts to improve this process, like zero-gap cell geometry, developmentof new diaphragm materials, development of new electrocatalytic materials for electrodes, etc. We tried here to use ionic activators to reduce energy consumption. Two types of activators, both ethylenediamine complexes of cobalt, were used separately or in combination with some molybdates. The activation energies were significantly decreased in the presence of single ionic activators. However, the best results regarding the activation energy reduction were obtained when combinations with the molybdate were used. On the basis of the results of our experiments there is a strong indication that the activation with ionic activators reduces energy needs per mass unit of hydrogen produced for more than 10% in some cases, compared to those of non-activated electrolytes. (C) 2003 Elsevier Science B.V. All rights reserved.
T2  - Journal of Power Sources
T1  - Hydrogen generation from water electrolysis - possibilities of energy saving
VL  - 118
IS  - 1-2
SP  - 315
EP  - 319
DO  - 10.1016/S0378-7753(03)00077-6
ER  - 

@article{
author = "Stojić, Dragica Lj. and Marčeta Kaninski, Milica and Sovilj, Sofija P. and Miljanić, Šćepan S.",
year = "2003",
abstract = "Hydrogen production via electrolysis of water from alkaline aqueous electrolytes is a well-established conventional technology. However, due to high energy requirements of about 4.5-5 kWh/m(n)(3) H-2 in most industrial electrolysers, the cost of hydrogen produced in such a way is n high. This is a limiting factor for the use of this method on a large scale, except in countries where the electricity is very cheap. There were various attempts to improve this process, like zero-gap cell geometry, developmentof new diaphragm materials, development of new electrocatalytic materials for electrodes, etc. We tried here to use ionic activators to reduce energy consumption. Two types of activators, both ethylenediamine complexes of cobalt, were used separately or in combination with some molybdates. The activation energies were significantly decreased in the presence of single ionic activators. However, the best results regarding the activation energy reduction were obtained when combinations with the molybdate were used. On the basis of the results of our experiments there is a strong indication that the activation with ionic activators reduces energy needs per mass unit of hydrogen produced for more than 10% in some cases, compared to those of non-activated electrolytes. (C) 2003 Elsevier Science B.V. All rights reserved.",
journal = "Journal of Power Sources",
title = "Hydrogen generation from water electrolysis - possibilities of energy saving",
volume = "118",
number = "1-2",
pages = "315-319",
doi = "10.1016/S0378-7753(03)00077-6"
}

Stojić, D. Lj., Marčeta Kaninski, M., Sovilj, S. P.,& Miljanić, Š. S.. (2003). Hydrogen generation from water electrolysis - possibilities of energy saving. in Journal of Power Sources, 118(1-2), 315-319.
https://doi.org/10.1016/S0378-7753(03)00077-6

Stojić DL, Marčeta Kaninski M, Sovilj SP, Miljanić ŠS. Hydrogen generation from water electrolysis - possibilities of energy saving. in Journal of Power Sources. 2003;118(1-2):315-319.
doi:10.1016/S0378-7753(03)00077-6 .

Stojić, Dragica Lj., Marčeta Kaninski, Milica, Sovilj, Sofija P., Miljanić, Šćepan S., "Hydrogen generation from water electrolysis - possibilities of energy saving" in Journal of Power Sources, 118, no. 1-2 (2003):315-319,
https://doi.org/10.1016/S0378-7753(03)00077-6 . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Babic-Samardzija, K
AU  - Minic, DM
AU  - Stojić, Dragica Lj.
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6316
AB  - The thermal properties of four cobalt(III) complexes with cyclam (1,4,8,11-tetraazacyclotetradecane) and the heterocyclic dithiocarbamates Rdtc(-) [2-, 3-, 4-methylpiperidine (2-, 3-, 4-Mepipdtc(-)) or 4-thiomorpholine (Timdtc(-)) dithiocarbamates], of the general formula [Co(Rdtc)cyclam](ClO4)(2), have been investigated by thermogravimetry (TG) and differential scanning calorimetry (DSC). The thermal decomposition pathways of these complexes were also proposed. The following thermal stability order can be recognized for the examined complexes. depending on the position of the methyl group on the piperidine ring coordinating dithiocarbamates 2- GT 3- GT 4 -Mepipdtc(-). Generally, the same order was found to affect the decrease in kinetic and activation parameters.
T2  - Materials Science Forum
T1  - Thermal stability and kinetic studies of new cobalt(III) complexes with a tetraazamacrocyclic and dithiocarbamate ligands
VL  - 352
SP  - 271
EP  - 276
DO  - 10.4028/www.scientific.net/MSF.352.271
ER  - 

@article{
author = "Sovilj, Sofija P. and Babic-Samardzija, K and Minic, DM and Stojić, Dragica Lj.",
year = "2000",
abstract = "The thermal properties of four cobalt(III) complexes with cyclam (1,4,8,11-tetraazacyclotetradecane) and the heterocyclic dithiocarbamates Rdtc(-) [2-, 3-, 4-methylpiperidine (2-, 3-, 4-Mepipdtc(-)) or 4-thiomorpholine (Timdtc(-)) dithiocarbamates], of the general formula [Co(Rdtc)cyclam](ClO4)(2), have been investigated by thermogravimetry (TG) and differential scanning calorimetry (DSC). The thermal decomposition pathways of these complexes were also proposed. The following thermal stability order can be recognized for the examined complexes. depending on the position of the methyl group on the piperidine ring coordinating dithiocarbamates 2- GT 3- GT 4 -Mepipdtc(-). Generally, the same order was found to affect the decrease in kinetic and activation parameters.",
journal = "Materials Science Forum",
title = "Thermal stability and kinetic studies of new cobalt(III) complexes with a tetraazamacrocyclic and dithiocarbamate ligands",
volume = "352",
pages = "271-276",
doi = "10.4028/www.scientific.net/MSF.352.271"
}

Sovilj, S. P., Babic-Samardzija, K., Minic, D.,& Stojić, D. Lj.. (2000). Thermal stability and kinetic studies of new cobalt(III) complexes with a tetraazamacrocyclic and dithiocarbamate ligands. in Materials Science Forum, 352, 271-276.
https://doi.org/10.4028/www.scientific.net/MSF.352.271

Sovilj SP, Babic-Samardzija K, Minic D, Stojić DL. Thermal stability and kinetic studies of new cobalt(III) complexes with a tetraazamacrocyclic and dithiocarbamate ligands. in Materials Science Forum. 2000;352:271-276.
doi:10.4028/www.scientific.net/MSF.352.271 .

Sovilj, Sofija P., Babic-Samardzija, K, Minic, DM, Stojić, Dragica Lj., "Thermal stability and kinetic studies of new cobalt(III) complexes with a tetraazamacrocyclic and dithiocarbamate ligands" in Materials Science Forum, 352 (2000):271-276,
https://doi.org/10.4028/www.scientific.net/MSF.352.271 . .

TY  - JOUR
AU  - Spasojević, Vojislav
AU  - Kusigerski, Vladan
AU  - Sovilj, Sofija P.
AU  - Mrozinski, J
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2377
AB  - Calculation of the magnetic susceptibility of Co2+ pairs in the recently synthesized cobaltous cluster complex [Co-2(ox)tpmc](ClO4)(2). 3H(2)O has been conducted by the use of two different theoretical models. The calculated results were compared to the experimental data collected in a wide temperature region. Conclusions on both the magnetic properties of Co2+ dimers and the validity of the proposed models have been drawn. In the temperature region above chi(T) maximum, the best results are obtained with the Heisenberg model that includes spin-orbit coupling and excited single-ion levels. In the low-temperature region anisotropy of the magnetic properties dominates and Ising dimer ground-stare model gives a more appropriate description. Obtained g-values (g(parallel to a) = 5.67, g(parallel to b) = 5.73, and g(perpendicular to) = 1.54) confirm strong Co2+ anisotropy. Each model gives the same value of the intracluster exchange integral J/k(B) approximate to - 14.6 K, within the fitting error. (C) 2000 Elsevier Science B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetic susceptibility of Co2+ pairs in [Co-2(ox)tpmc](ClO4)(2)center dot 3H(2)O cluster complex
VL  - 219
IS  - 3
SP  - 269
EP  - 274
DO  - 10.1016/S0304-8853(00)00021-4
ER  - 

@article{
author = "Spasojević, Vojislav and Kusigerski, Vladan and Sovilj, Sofija P. and Mrozinski, J",
year = "2000",
abstract = "Calculation of the magnetic susceptibility of Co2+ pairs in the recently synthesized cobaltous cluster complex [Co-2(ox)tpmc](ClO4)(2). 3H(2)O has been conducted by the use of two different theoretical models. The calculated results were compared to the experimental data collected in a wide temperature region. Conclusions on both the magnetic properties of Co2+ dimers and the validity of the proposed models have been drawn. In the temperature region above chi(T) maximum, the best results are obtained with the Heisenberg model that includes spin-orbit coupling and excited single-ion levels. In the low-temperature region anisotropy of the magnetic properties dominates and Ising dimer ground-stare model gives a more appropriate description. Obtained g-values (g(parallel to a) = 5.67, g(parallel to b) = 5.73, and g(perpendicular to) = 1.54) confirm strong Co2+ anisotropy. Each model gives the same value of the intracluster exchange integral J/k(B) approximate to - 14.6 K, within the fitting error. (C) 2000 Elsevier Science B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetic susceptibility of Co2+ pairs in [Co-2(ox)tpmc](ClO4)(2)center dot 3H(2)O cluster complex",
volume = "219",
number = "3",
pages = "269-274",
doi = "10.1016/S0304-8853(00)00021-4"
}

Spasojević, V., Kusigerski, V., Sovilj, S. P.,& Mrozinski, J.. (2000). Magnetic susceptibility of Co2+ pairs in [Co-2(ox)tpmc](ClO4)(2)center dot 3H(2)O cluster complex. in Journal of Magnetism and Magnetic Materials, 219(3), 269-274.
https://doi.org/10.1016/S0304-8853(00)00021-4

Spasojević V, Kusigerski V, Sovilj SP, Mrozinski J. Magnetic susceptibility of Co2+ pairs in [Co-2(ox)tpmc](ClO4)(2)center dot 3H(2)O cluster complex. in Journal of Magnetism and Magnetic Materials. 2000;219(3):269-274.
doi:10.1016/S0304-8853(00)00021-4 .

Spasojević, Vojislav, Kusigerski, Vladan, Sovilj, Sofija P., Mrozinski, J, "Magnetic susceptibility of Co2+ pairs in [Co-2(ox)tpmc](ClO4)(2)center dot 3H(2)O cluster complex" in Journal of Magnetism and Magnetic Materials, 219, no. 3 (2000):269-274,
https://doi.org/10.1016/S0304-8853(00)00021-4 . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Vasić, Vesna M.
AU  - Stojić, Dragica Lj.
AU  - Stojčeva-Radovanović, Blaga C.
AU  - Petkovska, Ljubica T.
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2157
AB  - The effect of the substituents, solvent polarities and hydrogen ion concentration on the electronic structure and UV/VIS absorption spectra of some Schiff bases, derivatives of N-(R-benzylidene)benzidine (R = o-NO2 and o-OH, p-OH) and N-(R-furfurylidene)benzidine (R = H and 5 - NO2), have been studied. The spectral shifts obtained in various organic solvents were discussed on the basis of the specific solute - solvent interactions through the formation of hydrogen bonds between hydrogen-bond donor (HBD) solvents and the benzidine nitrogen atom of the Schiff bases. Some interpretations of the electronic aspects of this type of hydrogen bonding were discussed as well as the stabilization effects due to the solvation. Finally, the pK values of the compounds were determined.
T2  - Spectroscopy Letters
T1  - Spectrophotometric studies of the influence of organic solvents and substituents on some Schiff bases
VL  - 31
IS  - 5
SP  - 1107
EP  - 1122
DO  - 10.1080/00387019808003288
ER  - 

@article{
author = "Sovilj, Sofija P. and Vasić, Vesna M. and Stojić, Dragica Lj. and Stojčeva-Radovanović, Blaga C. and Petkovska, Ljubica T.",
year = "1998",
abstract = "The effect of the substituents, solvent polarities and hydrogen ion concentration on the electronic structure and UV/VIS absorption spectra of some Schiff bases, derivatives of N-(R-benzylidene)benzidine (R = o-NO2 and o-OH, p-OH) and N-(R-furfurylidene)benzidine (R = H and 5 - NO2), have been studied. The spectral shifts obtained in various organic solvents were discussed on the basis of the specific solute - solvent interactions through the formation of hydrogen bonds between hydrogen-bond donor (HBD) solvents and the benzidine nitrogen atom of the Schiff bases. Some interpretations of the electronic aspects of this type of hydrogen bonding were discussed as well as the stabilization effects due to the solvation. Finally, the pK values of the compounds were determined.",
journal = "Spectroscopy Letters",
title = "Spectrophotometric studies of the influence of organic solvents and substituents on some Schiff bases",
volume = "31",
number = "5",
pages = "1107-1122",
doi = "10.1080/00387019808003288"
}

Sovilj, S. P., Vasić, V. M., Stojić, D. Lj., Stojčeva-Radovanović, B. C.,& Petkovska, L. T.. (1998). Spectrophotometric studies of the influence of organic solvents and substituents on some Schiff bases. in Spectroscopy Letters, 31(5), 1107-1122.
https://doi.org/10.1080/00387019808003288

Sovilj SP, Vasić VM, Stojić DL, Stojčeva-Radovanović BC, Petkovska LT. Spectrophotometric studies of the influence of organic solvents and substituents on some Schiff bases. in Spectroscopy Letters. 1998;31(5):1107-1122.
doi:10.1080/00387019808003288 .

Sovilj, Sofija P., Vasić, Vesna M., Stojić, Dragica Lj., Stojčeva-Radovanović, Blaga C., Petkovska, Ljubica T., "Spectrophotometric studies of the influence of organic solvents and substituents on some Schiff bases" in Spectroscopy Letters, 31, no. 5 (1998):1107-1122,
https://doi.org/10.1080/00387019808003288 . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Vasić, Vesna M.
AU  - Stojić, Dragica Lj.
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2113
AB  - The kinetics of the spontaneous reduction of hexanitrocobaltate(III) ion have been investigated spectrophotometrically (lambda=360 nm at 298 K) in ethanol or acetone water mixtures containing 0, 10, 25 and 50 % of organic solvents. The mechanism of this process was expressed by means of two consecutive first-order reactions. Both of the first-order rate constants decrease with the increasing nonaqueous species content. The reduction of hexanitrocobaltate(III) ion in the mixtures was much slower than the corresponding reaction in water.
T2  - Spectroscopy Letters
T1  - Spectrophotometric study of hexanitrocobaltate(III) ion spontaneous reduction in water-ethanol and water-acetone mixtures
VL  - 31
IS  - 1
SP  - 71
EP  - 85
DO  - 10.1080/00387019808006762
ER  - 

@article{
author = "Sovilj, Sofija P. and Vasić, Vesna M. and Stojić, Dragica Lj.",
year = "1998",
abstract = "The kinetics of the spontaneous reduction of hexanitrocobaltate(III) ion have been investigated spectrophotometrically (lambda=360 nm at 298 K) in ethanol or acetone water mixtures containing 0, 10, 25 and 50 % of organic solvents. The mechanism of this process was expressed by means of two consecutive first-order reactions. Both of the first-order rate constants decrease with the increasing nonaqueous species content. The reduction of hexanitrocobaltate(III) ion in the mixtures was much slower than the corresponding reaction in water.",
journal = "Spectroscopy Letters",
title = "Spectrophotometric study of hexanitrocobaltate(III) ion spontaneous reduction in water-ethanol and water-acetone mixtures",
volume = "31",
number = "1",
pages = "71-85",
doi = "10.1080/00387019808006762"
}

Sovilj, S. P., Vasić, V. M.,& Stojić, D. Lj.. (1998). Spectrophotometric study of hexanitrocobaltate(III) ion spontaneous reduction in water-ethanol and water-acetone mixtures. in Spectroscopy Letters, 31(1), 71-85.
https://doi.org/10.1080/00387019808006762

Sovilj SP, Vasić VM, Stojić DL. Spectrophotometric study of hexanitrocobaltate(III) ion spontaneous reduction in water-ethanol and water-acetone mixtures. in Spectroscopy Letters. 1998;31(1):71-85.
doi:10.1080/00387019808006762 .

Sovilj, Sofija P., Vasić, Vesna M., Stojić, Dragica Lj., "Spectrophotometric study of hexanitrocobaltate(III) ion spontaneous reduction in water-ethanol and water-acetone mixtures" in Spectroscopy Letters, 31, no. 1 (1998):71-85,
https://doi.org/10.1080/00387019808006762 . .