TY  - JOUR
AU  - Veljković, Filip M.
AU  - Dimitrijević, Stevan P.
AU  - Dimitrijević, Silvana B.
AU  - Vurdelja, Borislava D.
AU  - Matović, Branko
AU  - Stoiljković, Milovan
AU  - Kamberović, Željko
AU  - Veličković, Suzana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10589
AB  - This work presents the perspective of applying the laser desorption/ionization mass spectrometry (LDI MS) for characterization the anode film of the Ag60Cu26Zn14, Ag58.5Cu31.5Pd10, and Ag63Cu27In10 alloys (at high concentrations of chloride ions in solutions). The reference LDI mass spectra of anode films of pure Ag and Cu have been used for the identification of product corrosion. Knowing the clusters detected in the reference spectra lead to the facilitating identification of the LDI mass spectrum of the sample and reduces the analysis time. The LDI MS analysis of these alloys revealed that the predominant corrosion product are AgCl (from AgnCln+1−/+, n = 1–3), and CuCl (from “superhalogen” CumCln− clusters, m = 1–2, n = 2–6); it also revealed Cu2(OH)3Cl (from Cu2(OH)(H2O)2+) and Cu2O (from Cu(H2O)+, Cu2O doped with chlorine). These results are in accordance with the X-ray diffraction and Raman analysis. The LDI MS spectra of alloys contain the additional peaks formed due to the mutual influences of different metals in the alloys (AgCuCl3− (AgCl-CuCl2−), AgCu2Cl4− (AgCl-CuCl-CuCl2−), and Ag2CuCl4− (AgCl-AgCl-CuCl−), which is consistent with the identified corrosion products. It should be noted that the LDI MS suggest the presence of CuCl2, which can be interpreted as the corrosion products retained in the porous films of alloys, and not detected by the other methods due to a small amount. The future theoretical and experimental studies of metal clusters, significant for metallurgy, can contribute that the LDI MS is becoming a powerful analytical tool for characterization the metal surfaces.
T2  - Arabian Journal of Chemistry
T1  - Prospective of the LDI MS to characterization the corrosion products of silver-copper alloys on an example of the Ag-Cu-X (X- Zn, Pd, In) system
VL  - 16
IS  - 2
SP  - 104461
DO  - 10.1016/j.arabjc.2022.104461
ER  - 

@article{
author = "Veljković, Filip M. and Dimitrijević, Stevan P. and Dimitrijević, Silvana B. and Vurdelja, Borislava D. and Matović, Branko and Stoiljković, Milovan and Kamberović, Željko and Veličković, Suzana",
year = "2023",
abstract = "This work presents the perspective of applying the laser desorption/ionization mass spectrometry (LDI MS) for characterization the anode film of the Ag60Cu26Zn14, Ag58.5Cu31.5Pd10, and Ag63Cu27In10 alloys (at high concentrations of chloride ions in solutions). The reference LDI mass spectra of anode films of pure Ag and Cu have been used for the identification of product corrosion. Knowing the clusters detected in the reference spectra lead to the facilitating identification of the LDI mass spectrum of the sample and reduces the analysis time. The LDI MS analysis of these alloys revealed that the predominant corrosion product are AgCl (from AgnCln+1−/+, n = 1–3), and CuCl (from “superhalogen” CumCln− clusters, m = 1–2, n = 2–6); it also revealed Cu2(OH)3Cl (from Cu2(OH)(H2O)2+) and Cu2O (from Cu(H2O)+, Cu2O doped with chlorine). These results are in accordance with the X-ray diffraction and Raman analysis. The LDI MS spectra of alloys contain the additional peaks formed due to the mutual influences of different metals in the alloys (AgCuCl3− (AgCl-CuCl2−), AgCu2Cl4− (AgCl-CuCl-CuCl2−), and Ag2CuCl4− (AgCl-AgCl-CuCl−), which is consistent with the identified corrosion products. It should be noted that the LDI MS suggest the presence of CuCl2, which can be interpreted as the corrosion products retained in the porous films of alloys, and not detected by the other methods due to a small amount. The future theoretical and experimental studies of metal clusters, significant for metallurgy, can contribute that the LDI MS is becoming a powerful analytical tool for characterization the metal surfaces.",
journal = "Arabian Journal of Chemistry",
title = "Prospective of the LDI MS to characterization the corrosion products of silver-copper alloys on an example of the Ag-Cu-X (X- Zn, Pd, In) system",
volume = "16",
number = "2",
pages = "104461",
doi = "10.1016/j.arabjc.2022.104461"
}

Veljković, F. M., Dimitrijević, S. P., Dimitrijević, S. B., Vurdelja, B. D., Matović, B., Stoiljković, M., Kamberović, Ž.,& Veličković, S.. (2023). Prospective of the LDI MS to characterization the corrosion products of silver-copper alloys on an example of the Ag-Cu-X (X- Zn, Pd, In) system. in Arabian Journal of Chemistry, 16(2), 104461.
https://doi.org/10.1016/j.arabjc.2022.104461

Veljković FM, Dimitrijević SP, Dimitrijević SB, Vurdelja BD, Matović B, Stoiljković M, Kamberović Ž, Veličković S. Prospective of the LDI MS to characterization the corrosion products of silver-copper alloys on an example of the Ag-Cu-X (X- Zn, Pd, In) system. in Arabian Journal of Chemistry. 2023;16(2):104461.
doi:10.1016/j.arabjc.2022.104461 .

Veljković, Filip M., Dimitrijević, Stevan P., Dimitrijević, Silvana B., Vurdelja, Borislava D., Matović, Branko, Stoiljković, Milovan, Kamberović, Željko, Veličković, Suzana, "Prospective of the LDI MS to characterization the corrosion products of silver-copper alloys on an example of the Ag-Cu-X (X- Zn, Pd, In) system" in Arabian Journal of Chemistry, 16, no. 2 (2023):104461,
https://doi.org/10.1016/j.arabjc.2022.104461 . .

TY  - JOUR
AU  - Dimitrijević, Stevan P.
AU  - Vurdelja, Borislava D.
AU  - Dimitrijević, Silvana B.
AU  - Veljković, Filip M.
AU  - Kamberović, Željko
AU  - Veličković, Suzana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8569
AB  - Corrosion products formed on the surface of two silver brazing alloys after the potentiostatic polarization in 3.5% sodium chloride solution were characterized by the standard methods such as, the X-ray diffraction, micro-Raman spectroscopy, and scanning electron microscopy with energy-dispersive spectroscopy. This paper presents the results of a laser desorption/ionization mass spectrometry (LDI MS) analysis as a new approach to the characterization of corrosion products. The potential of the anodic polarization was 0.5 V versus saturated calomel electrode, and the process duration was 300 s. The corrosion layers on both investigated alloys were similar in composition with cuprous chloride and silver chloride as the main components and had strong indications of cuprous oxide formation. The major difference between these two layers was the existence of zinc hydroxychloride as the corrosion product of Ag-Cu-Zn alloy. Palladium compounds were not found in the case of Ag-Cu-Pd alloy. The results of different methods have shown a good consistency. Complementarity between the used methods was useful in the interpretation of the results for each used method. This study has demonstrated that LDI MS can be used as an efficient additional method together with the traditional ones.
T2  - Corrosion Reviews
T1  - Complementary methods for characterization of the corrosion products on the surface of Ag60Cu26Zn14 and Ag58.5Cu31.5Pd10 brazing alloys
VL  - 38
IS  - 2
SP  - 111
EP  - 125
DO  - 10.1515/corrrev-2019-0067
ER  - 

@article{
author = "Dimitrijević, Stevan P. and Vurdelja, Borislava D. and Dimitrijević, Silvana B. and Veljković, Filip M. and Kamberović, Željko and Veličković, Suzana",
year = "2020",
abstract = "Corrosion products formed on the surface of two silver brazing alloys after the potentiostatic polarization in 3.5% sodium chloride solution were characterized by the standard methods such as, the X-ray diffraction, micro-Raman spectroscopy, and scanning electron microscopy with energy-dispersive spectroscopy. This paper presents the results of a laser desorption/ionization mass spectrometry (LDI MS) analysis as a new approach to the characterization of corrosion products. The potential of the anodic polarization was 0.5 V versus saturated calomel electrode, and the process duration was 300 s. The corrosion layers on both investigated alloys were similar in composition with cuprous chloride and silver chloride as the main components and had strong indications of cuprous oxide formation. The major difference between these two layers was the existence of zinc hydroxychloride as the corrosion product of Ag-Cu-Zn alloy. Palladium compounds were not found in the case of Ag-Cu-Pd alloy. The results of different methods have shown a good consistency. Complementarity between the used methods was useful in the interpretation of the results for each used method. This study has demonstrated that LDI MS can be used as an efficient additional method together with the traditional ones.",
journal = "Corrosion Reviews",
title = "Complementary methods for characterization of the corrosion products on the surface of Ag60Cu26Zn14 and Ag58.5Cu31.5Pd10 brazing alloys",
volume = "38",
number = "2",
pages = "111-125",
doi = "10.1515/corrrev-2019-0067"
}

Dimitrijević, S. P., Vurdelja, B. D., Dimitrijević, S. B., Veljković, F. M., Kamberović, Ž.,& Veličković, S.. (2020). Complementary methods for characterization of the corrosion products on the surface of Ag60Cu26Zn14 and Ag58.5Cu31.5Pd10 brazing alloys. in Corrosion Reviews, 38(2), 111-125.
https://doi.org/10.1515/corrrev-2019-0067

Dimitrijević SP, Vurdelja BD, Dimitrijević SB, Veljković FM, Kamberović Ž, Veličković S. Complementary methods for characterization of the corrosion products on the surface of Ag60Cu26Zn14 and Ag58.5Cu31.5Pd10 brazing alloys. in Corrosion Reviews. 2020;38(2):111-125.
doi:10.1515/corrrev-2019-0067 .

Dimitrijević, Stevan P., Vurdelja, Borislava D., Dimitrijević, Silvana B., Veljković, Filip M., Kamberović, Željko, Veličković, Suzana, "Complementary methods for characterization of the corrosion products on the surface of Ag60Cu26Zn14 and Ag58.5Cu31.5Pd10 brazing alloys" in Corrosion Reviews, 38, no. 2 (2020):111-125,
https://doi.org/10.1515/corrrev-2019-0067 . .

TY  - JOUR
AU  - Veljković, Filip M.
AU  - Vurdelja, Borislava D.
AU  - Rajčić, Boris
AU  - Veličković, Suzana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8482
AB  - Abstract: In the present paper, ionization energies of LinCln – 1 (n = 3, 4, and 5) clusters were studied by means of the modified Knudsen cell mass spectrometry method, for the first time. The temperature dependence of the intensities of Li3Cl2 +, Li4Cl3 + and Li5Cl4 + ions were measured in the interval 1128–1616, 1126–1435, and 1947–2278 K, respectively. The following ionization energies were obtained: IE(Li3Cl2) = 4.51 ± 0.2 eV, IE(Li4Cl3) = 4.18 ± 0.2 eV, and IE(Li4Cl3) = 5.05 ± 0.2 eV. A good correlation of the experimental results with the theoretical adiabatic ionization energy is recognized. Results are confirmation that these clusters can be classified as “superalkalis.”. © 2019, Pleiades Publishing, Ltd.
T2  - Russian Journal of Physical Chemistry A
T1  - Ionization Energies of LinCln – 1 (n = 3, 4, and 5) Clusters Studied by the Modified Knudsen Cell Mass Spectrometry Method
VL  - 93
IS  - 13
SP  - 2699
EP  - 2702
DO  - 10.1134/S0036024419130302
ER  - 

@article{
author = "Veljković, Filip M. and Vurdelja, Borislava D. and Rajčić, Boris and Veličković, Suzana",
year = "2019",
abstract = "Abstract: In the present paper, ionization energies of LinCln – 1 (n = 3, 4, and 5) clusters were studied by means of the modified Knudsen cell mass spectrometry method, for the first time. The temperature dependence of the intensities of Li3Cl2 +, Li4Cl3 + and Li5Cl4 + ions were measured in the interval 1128–1616, 1126–1435, and 1947–2278 K, respectively. The following ionization energies were obtained: IE(Li3Cl2) = 4.51 ± 0.2 eV, IE(Li4Cl3) = 4.18 ± 0.2 eV, and IE(Li4Cl3) = 5.05 ± 0.2 eV. A good correlation of the experimental results with the theoretical adiabatic ionization energy is recognized. Results are confirmation that these clusters can be classified as “superalkalis.”. © 2019, Pleiades Publishing, Ltd.",
journal = "Russian Journal of Physical Chemistry A",
title = "Ionization Energies of LinCln – 1 (n = 3, 4, and 5) Clusters Studied by the Modified Knudsen Cell Mass Spectrometry Method",
volume = "93",
number = "13",
pages = "2699-2702",
doi = "10.1134/S0036024419130302"
}

Veljković, F. M., Vurdelja, B. D., Rajčić, B.,& Veličković, S.. (2019). Ionization Energies of LinCln – 1 (n = 3, 4, and 5) Clusters Studied by the Modified Knudsen Cell Mass Spectrometry Method. in Russian Journal of Physical Chemistry A, 93(13), 2699-2702.
https://doi.org/10.1134/S0036024419130302

Veljković FM, Vurdelja BD, Rajčić B, Veličković S. Ionization Energies of LinCln – 1 (n = 3, 4, and 5) Clusters Studied by the Modified Knudsen Cell Mass Spectrometry Method. in Russian Journal of Physical Chemistry A. 2019;93(13):2699-2702.
doi:10.1134/S0036024419130302 .

Veljković, Filip M., Vurdelja, Borislava D., Rajčić, Boris, Veličković, Suzana, "Ionization Energies of LinCln – 1 (n = 3, 4, and 5) Clusters Studied by the Modified Knudsen Cell Mass Spectrometry Method" in Russian Journal of Physical Chemistry A, 93, no. 13 (2019):2699-2702,
https://doi.org/10.1134/S0036024419130302 . .

TY  - JOUR
AU  - Vurdelja, Borislava D.
AU  - Dimitrijević, Stevan P.
AU  - Dimitrijević, Silvana B.
AU  - Kamberović, Željko
AU  - Veličković, Suzana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1847
AB  - This work is the first to demonstrate the possibilities of direct analysis of the corrosion film formed on Ag43Cu37Zn20 alloy using laser desorption/ionization (LDI) on a commercial matrix-assisted LDI time of flight mass spectrometry (MS) instrument. In the LDI mass spectra measured from the water solution of the corrosion film, the ion species Zn+, Zn(H2O)(+), AgH+, Cu2H+, Cu2O(OH)+, Cu3O(OH)(+) (high intensity), and Cu(OH)(H2O)(+), ZnCl(OH)(H2O)(+), AgCl+, CuCl+ (low intensity) were identified. The LDI mass spectra of the propan-2-ol solution of the corrosion film contains the ions Zn5Cl(OH)(3)(H2O)(11)(+), Zn5Cl2 (OH)(8) (H2O)(6)(+), and Zn5Cl2 (OH)(H2O)(14)(+). Mass spectra were observed at laser energies in the range of 1340-1860 arbitrary units in positive ion mode. Previously, Raman spectra and X-ray diffraction (XRD) analysis of the same anodic film have shown similar results as LDI MS -that the anodic film contains the mixture of Ag, Cu2O, CuCl, Zn5Cl2(OH)(8) center dot H2O, and beta-Zn(OH) Cl. LDI MS could be a complementary method for XRD and Raman, as demonstrated in this investigation. The LDI MS method greatly reduces the analysis time and amount of the sample compared to traditional methods. For this reason, the LDI MS method can be a useful tool for the fast qualitative screening of corrosion films.
T2  - Corrosion Reviews
T1  - Characterization of the Ag43Cu37Zn20 alloy surface after potentiostatic polarization using LDI-TOF mass spectrometry
VL  - 35
IS  - 6
SP  - 473
EP  - 481
DO  - 10.1515/corrrev-2017-0065
ER  - 

@article{
author = "Vurdelja, Borislava D. and Dimitrijević, Stevan P. and Dimitrijević, Silvana B. and Kamberović, Željko and Veličković, Suzana",
year = "2017",
abstract = "This work is the first to demonstrate the possibilities of direct analysis of the corrosion film formed on Ag43Cu37Zn20 alloy using laser desorption/ionization (LDI) on a commercial matrix-assisted LDI time of flight mass spectrometry (MS) instrument. In the LDI mass spectra measured from the water solution of the corrosion film, the ion species Zn+, Zn(H2O)(+), AgH+, Cu2H+, Cu2O(OH)+, Cu3O(OH)(+) (high intensity), and Cu(OH)(H2O)(+), ZnCl(OH)(H2O)(+), AgCl+, CuCl+ (low intensity) were identified. The LDI mass spectra of the propan-2-ol solution of the corrosion film contains the ions Zn5Cl(OH)(3)(H2O)(11)(+), Zn5Cl2 (OH)(8) (H2O)(6)(+), and Zn5Cl2 (OH)(H2O)(14)(+). Mass spectra were observed at laser energies in the range of 1340-1860 arbitrary units in positive ion mode. Previously, Raman spectra and X-ray diffraction (XRD) analysis of the same anodic film have shown similar results as LDI MS -that the anodic film contains the mixture of Ag, Cu2O, CuCl, Zn5Cl2(OH)(8) center dot H2O, and beta-Zn(OH) Cl. LDI MS could be a complementary method for XRD and Raman, as demonstrated in this investigation. The LDI MS method greatly reduces the analysis time and amount of the sample compared to traditional methods. For this reason, the LDI MS method can be a useful tool for the fast qualitative screening of corrosion films.",
journal = "Corrosion Reviews",
title = "Characterization of the Ag43Cu37Zn20 alloy surface after potentiostatic polarization using LDI-TOF mass spectrometry",
volume = "35",
number = "6",
pages = "473-481",
doi = "10.1515/corrrev-2017-0065"
}

Vurdelja, B. D., Dimitrijević, S. P., Dimitrijević, S. B., Kamberović, Ž.,& Veličković, S.. (2017). Characterization of the Ag43Cu37Zn20 alloy surface after potentiostatic polarization using LDI-TOF mass spectrometry. in Corrosion Reviews, 35(6), 473-481.
https://doi.org/10.1515/corrrev-2017-0065

Vurdelja BD, Dimitrijević SP, Dimitrijević SB, Kamberović Ž, Veličković S. Characterization of the Ag43Cu37Zn20 alloy surface after potentiostatic polarization using LDI-TOF mass spectrometry. in Corrosion Reviews. 2017;35(6):473-481.
doi:10.1515/corrrev-2017-0065 .

Vurdelja, Borislava D., Dimitrijević, Stevan P., Dimitrijević, Silvana B., Kamberović, Željko, Veličković, Suzana, "Characterization of the Ag43Cu37Zn20 alloy surface after potentiostatic polarization using LDI-TOF mass spectrometry" in Corrosion Reviews, 35, no. 6 (2017):473-481,
https://doi.org/10.1515/corrrev-2017-0065 . .

TY  - CONF
AU  - Pajkić, Borislava
AU  - Milošević, Maja
AU  - Veličković, Suzana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9184
AB  - Lithium heterogeneous clusters were generated from lithium chloride salt using laser desorption/ionization (LDI) on a commercial matrix assisted laser desorption ionization – time of flight (MALDI-TOF) mass spectrometric instrument. The generation of LinCl (n= 2 – 8) clusters, has been successfully achieved in the positive mode when the initial salt concentrations were above approximately 10-3 M and after applying sufficiently high laser energy of 2.3 mW. These clusters can be obtained at higher concentration of LiCl, but the laser energy must be above 3.0 mW. Laser desorption/ionization also leads to the formation of several protonated lithium chloride cluster ions (Li3ClH+ , Li7ClH+), Lin(H2O)2+  and Lin(OH)2+.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Generation of gas-phase lithium chloride cluster ions by laser desorption/ionization mass spectrometry
VL  - B-13-P
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9184
ER  - 

@conference{
author = "Pajkić, Borislava and Milošević, Maja and Veličković, Suzana",
year = "2014",
abstract = "Lithium heterogeneous clusters were generated from lithium chloride salt using laser desorption/ionization (LDI) on a commercial matrix assisted laser desorption ionization – time of flight (MALDI-TOF) mass spectrometric instrument. The generation of LinCl (n= 2 – 8) clusters, has been successfully achieved in the positive mode when the initial salt concentrations were above approximately 10-3 M and after applying sufficiently high laser energy of 2.3 mW. These clusters can be obtained at higher concentration of LiCl, but the laser energy must be above 3.0 mW. Laser desorption/ionization also leads to the formation of several protonated lithium chloride cluster ions (Li3ClH+ , Li7ClH+), Lin(H2O)2+  and Lin(OH)2+.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Generation of gas-phase lithium chloride cluster ions by laser desorption/ionization mass spectrometry",
volume = "B-13-P",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9184"
}

Pajkić, B., Milošević, M.,& Veličković, S.. (2014). Generation of gas-phase lithium chloride cluster ions by laser desorption/ionization mass spectrometry. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., B-13-P.
https://hdl.handle.net/21.15107/rcub_vinar_9184

Pajkić B, Milošević M, Veličković S. Generation of gas-phase lithium chloride cluster ions by laser desorption/ionization mass spectrometry. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2014;B-13-P.
https://hdl.handle.net/21.15107/rcub_vinar_9184 .

Pajkić, Borislava, Milošević, Maja, Veličković, Suzana, "Generation of gas-phase lithium chloride cluster ions by laser desorption/ionization mass spectrometry" in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry, B-13-P (2014),
https://hdl.handle.net/21.15107/rcub_vinar_9184 .