TY  - JOUR
AU  - Veličković, Suzana
AU  - Veljković, Filip M.
AU  - Perić-Grujić, Aleksandra
AU  - Radak, Bojan
AU  - Veljković, Miomir V.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1859
AB  - The electronic structure and properties of dipotassiummonohalides are important for understanding the unique physical and chemical behavior of MnX systems. In the present study, K2X (here X=F, Cl, Br, I) clusters were generated in the vapor over salts of the corresponding potassium halide, using a magnetic sector thermal ionization mass spectrometer. The ionization energies obtained for K2F, K2Cl, K2Br, and K2I molecules were 3.82 +/- 0.1eV, 3.68 +/- 0.1eV, 3.95 +/- 0.1eV, and 3.92 +/- 0.1, respectively. These experimental values of ionization energies for K2X (X=F, Br, and I) are presented for the first time. The ionization energy of K2Cl determined by thermal ionization corresponds to previous results obtained by photoionization mass spectrometry, and it agrees with the theoretical ionization energy calculated by the ab initio method. The presently obtained results support previous theoretical predictions that the excess electron in dipotassiummonohalide clusters is delocalized over two potassium atoms, which is characteristic for F-center clusters.
PB  - Wiley, Hoboken
T2  - Rapid Communications in Mass Spectrometry
T1  - Ionization energies of K2X (X=F, Cl, Br, I) clusters
EP  - 2332
IS  - 16
SP  - 2327
VL  - 25
DO  - 10.1002/rcm.5128
ER  - 

@article{
author = "Veličković, Suzana and Veljković, Filip M. and Perić-Grujić, Aleksandra and Radak, Bojan and Veljković, Miomir V.",
year = "2011",
abstract = "The electronic structure and properties of dipotassiummonohalides are important for understanding the unique physical and chemical behavior of MnX systems. In the present study, K2X (here X=F, Cl, Br, I) clusters were generated in the vapor over salts of the corresponding potassium halide, using a magnetic sector thermal ionization mass spectrometer. The ionization energies obtained for K2F, K2Cl, K2Br, and K2I molecules were 3.82 +/- 0.1eV, 3.68 +/- 0.1eV, 3.95 +/- 0.1eV, and 3.92 +/- 0.1, respectively. These experimental values of ionization energies for K2X (X=F, Br, and I) are presented for the first time. The ionization energy of K2Cl determined by thermal ionization corresponds to previous results obtained by photoionization mass spectrometry, and it agrees with the theoretical ionization energy calculated by the ab initio method. The presently obtained results support previous theoretical predictions that the excess electron in dipotassiummonohalide clusters is delocalized over two potassium atoms, which is characteristic for F-center clusters.",
publisher = "Wiley, Hoboken",
journal = "Rapid Communications in Mass Spectrometry",
title = "Ionization energies of K2X (X=F, Cl, Br, I) clusters",
pages = "2332-2327",
number = "16",
volume = "25",
doi = "10.1002/rcm.5128"
}

Veličković, S., Veljković, F. M., Perić-Grujić, A., Radak, B.,& Veljković, M. V.. (2011). Ionization energies of K2X (X=F, Cl, Br, I) clusters. in Rapid Communications in Mass Spectrometry
Wiley, Hoboken., 25(16), 2327-2332.
https://doi.org/10.1002/rcm.5128

Veličković S, Veljković FM, Perić-Grujić A, Radak B, Veljković MV. Ionization energies of K2X (X=F, Cl, Br, I) clusters. in Rapid Communications in Mass Spectrometry. 2011;25(16):2327-2332.
doi:10.1002/rcm.5128 .

Veličković, Suzana, Veljković, Filip M., Perić-Grujić, Aleksandra, Radak, Bojan, Veljković, Miomir V., "Ionization energies of K2X (X=F, Cl, Br, I) clusters" in Rapid Communications in Mass Spectrometry, 25, no. 16 (2011):2327-2332,
https://doi.org/10.1002/rcm.5128 . .

TY  - JOUR
AU  - Radak, Bojan
AU  - Petkovska, Menka
AU  - Trtica, Milan
AU  - Miljanić, SS
AU  - Petkovska, LT
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/608
AB  - Detection of specific molecules in the atmosphere is motivated by the need for monitoring the emission of industrial pollutants. CO2-laser photoacoustic (PA) spectroscopy was used here to obtain coincidence spectra of the vapours of three organic solvents: trichloroethylene (TCE), benzene, and dioxan. Spectra of coincidences were obtained as a function of total pressure, adding dry air to the vapour of the solvents up to 1000 mbar. A narrow cavity photoacoustic cell with window acoustic buffers was built for improved sensitivity, and is reported here. The vapour molecules studied do have some significant absorption in the CO2-laser region, or close to it, but that fact does not necessarily lead to usable coincidences with the narrow laser lines. The results reveal several prominent coincidences that can be used for practical purposes, especially in the case of trichloroethylene.
PB  - Elsevier, Amsterdam
T2  - Analytica Chimica Acta
T1  - Photoacoustic study of CO2-laser coincidences with absorption of some organic solvent vapours
EP  - 71
IS  - 1
SP  - 67
VL  - 505
DO  - 10.1016/S0003-2670(03)00572-5
ER  - 

@article{
author = "Radak, Bojan and Petkovska, Menka and Trtica, Milan and Miljanić, SS and Petkovska, LT",
year = "2004",
abstract = "Detection of specific molecules in the atmosphere is motivated by the need for monitoring the emission of industrial pollutants. CO2-laser photoacoustic (PA) spectroscopy was used here to obtain coincidence spectra of the vapours of three organic solvents: trichloroethylene (TCE), benzene, and dioxan. Spectra of coincidences were obtained as a function of total pressure, adding dry air to the vapour of the solvents up to 1000 mbar. A narrow cavity photoacoustic cell with window acoustic buffers was built for improved sensitivity, and is reported here. The vapour molecules studied do have some significant absorption in the CO2-laser region, or close to it, but that fact does not necessarily lead to usable coincidences with the narrow laser lines. The results reveal several prominent coincidences that can be used for practical purposes, especially in the case of trichloroethylene.",
publisher = "Elsevier, Amsterdam",
journal = "Analytica Chimica Acta",
title = "Photoacoustic study of CO2-laser coincidences with absorption of some organic solvent vapours",
pages = "71-67",
number = "1",
volume = "505",
doi = "10.1016/S0003-2670(03)00572-5"
}

Radak, B., Petkovska, M., Trtica, M., Miljanić, S.,& Petkovska, L.. (2004). Photoacoustic study of CO2-laser coincidences with absorption of some organic solvent vapours. in Analytica Chimica Acta
Elsevier, Amsterdam., 505(1), 67-71.
https://doi.org/10.1016/S0003-2670(03)00572-5

Radak B, Petkovska M, Trtica M, Miljanić S, Petkovska L. Photoacoustic study of CO2-laser coincidences with absorption of some organic solvent vapours. in Analytica Chimica Acta. 2004;505(1):67-71.
doi:10.1016/S0003-2670(03)00572-5 .

Radak, Bojan, Petkovska, Menka, Trtica, Milan, Miljanić, SS, Petkovska, LT, "Photoacoustic study of CO2-laser coincidences with absorption of some organic solvent vapours" in Analytica Chimica Acta, 505, no. 1 (2004):67-71,
https://doi.org/10.1016/S0003-2670(03)00572-5 . .