TY  - JOUR
AU  - Tomović, Aleksandar
AU  - Jovanović, Vladimir P.
AU  - Djurišić, Ivana
AU  - Cerovski, Viktor
AU  - Nastasijević, Branislav
AU  - Veličković, Suzana
AU  - Radulović, Katarina
AU  - Žikić, Radomir
AU  - Srdanov, Vojislav I.
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1902
AB  - We studied degradation of 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl (DPVBi), well know OLED material. Thermally evaporated thin films of DPVBi were irradiated with UV light in ambient, vacuum and under different oxygen pressures. The cause of degradation is reaction between UV excited DPVBi molecules and oxygen, via formation of singlet oxygen or electron transfer from excited DPVBi to molecular oxygen. Reaction rates depend on oxygen concentration and UV light intensity. These reactions lead to formation of oxidized species as evidenced by ASAP and MALDI-TOF mass spectroscopy. Photoluminescence quenching has two parts. One part is reversible and may imply formation of charge transfer complexes and the other is irreversible, caused by formation of oxidized species. IR and absorption spectra are studied by Density Functional Theory and results compared with the experiment.
PB  - Materials Research Society of Serbia
T2  - THE SIXTEENTH ANNUAL CONFERENCE YUCOMAT 2014 Programme and The Book of Abstracts
T1  - Degradation of thin 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl films by UV light
SP  - 100
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1902
ER  - 

@article{
author = "Tomović, Aleksandar and Jovanović, Vladimir P. and Djurišić, Ivana and Cerovski, Viktor and Nastasijević, Branislav and Veličković, Suzana and Radulović, Katarina and Žikić, Radomir and Srdanov, Vojislav I.",
year = "2014",
abstract = "We studied degradation of 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl (DPVBi), well know OLED material. Thermally evaporated thin films of DPVBi were irradiated with UV light in ambient, vacuum and under different oxygen pressures. The cause of degradation is reaction between UV excited DPVBi molecules and oxygen, via formation of singlet oxygen or electron transfer from excited DPVBi to molecular oxygen. Reaction rates depend on oxygen concentration and UV light intensity. These reactions lead to formation of oxidized species as evidenced by ASAP and MALDI-TOF mass spectroscopy. Photoluminescence quenching has two parts. One part is reversible and may imply formation of charge transfer complexes and the other is irreversible, caused by formation of oxidized species. IR and absorption spectra are studied by Density Functional Theory and results compared with the experiment.",
publisher = "Materials Research Society of Serbia",
journal = "THE SIXTEENTH ANNUAL CONFERENCE YUCOMAT 2014 Programme and The Book of Abstracts",
title = "Degradation of thin 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl films by UV light",
pages = "100",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1902"
}

Tomović, A., Jovanović, V. P., Djurišić, I., Cerovski, V., Nastasijević, B., Veličković, S., Radulović, K., Žikić, R.,& Srdanov, V. I.. (2014). Degradation of thin 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl films by UV light. in THE SIXTEENTH ANNUAL CONFERENCE YUCOMAT 2014 Programme and The Book of Abstracts
Materials Research Society of Serbia., 100.
https://hdl.handle.net/21.15107/rcub_rimsi_1902

Tomović A, Jovanović VP, Djurišić I, Cerovski V, Nastasijević B, Veličković S, Radulović K, Žikić R, Srdanov VI. Degradation of thin 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl films by UV light. in THE SIXTEENTH ANNUAL CONFERENCE YUCOMAT 2014 Programme and The Book of Abstracts. 2014;:100.
https://hdl.handle.net/21.15107/rcub_rimsi_1902 .

Tomović, Aleksandar, Jovanović, Vladimir P., Djurišić, Ivana, Cerovski, Viktor, Nastasijević, Branislav, Veličković, Suzana, Radulović, Katarina, Žikić, Radomir, Srdanov, Vojislav I., "Degradation of thin 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl films by UV light" in THE SIXTEENTH ANNUAL CONFERENCE YUCOMAT 2014 Programme and The Book of Abstracts (2014):100,
https://hdl.handle.net/21.15107/rcub_rimsi_1902 .

TY  - CONF
AU  - Nastasijević, Branislav
AU  - Tomović, Aleksandar
AU  - Jovanović, Vladimir P.
AU  - Žikić, Radomir
AU  - Veličković, Suzana
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1897
AB  - An Atmospheric pressure Solids Analysis Probe (ASAP) mass spectrometer are used for investigation the ionization mechanism and fragmentation pathways of 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl (DPVBi). DPVBi is material used in OLEDs (organic light-emitting diode). Results obtained indicate that by controlling ion source conditions it is possible to optimize forming of desired precursor ion, primarily radical cation and in less content protonated ion of DPVBi. The results presented illustrate the usefulness of ASAP MS in the characterization of DPVBi compounds.
PB  - Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2014 (Proceedings, Volume III)
T1  - ANALYSIS OF 4,4′-BIS(2,2′DIPHENYL VINYL)-1,1′- BIPHENYL USING THE ATMOSPHERIC-PRESSURE SOLIDS ANALYSIS PROBE FOR IONIZATION
EP  - 1066
SP  - 1063
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1897
ER  - 

@conference{
author = "Nastasijević, Branislav and Tomović, Aleksandar and Jovanović, Vladimir P. and Žikić, Radomir and Veličković, Suzana",
year = "2014",
abstract = "An Atmospheric pressure Solids Analysis Probe (ASAP) mass spectrometer are used for investigation the ionization mechanism and fragmentation pathways of 4,4′-bis(2,2′diphenyl vinyl)-1,1′-biphenyl (DPVBi). DPVBi is material used in OLEDs (organic light-emitting diode). Results obtained indicate that by controlling ion source conditions it is possible to optimize forming of desired precursor ion, primarily radical cation and in less content protonated ion of DPVBi. The results presented illustrate the usefulness of ASAP MS in the characterization of DPVBi compounds.",
publisher = "Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2014 (Proceedings, Volume III)",
title = "ANALYSIS OF 4,4′-BIS(2,2′DIPHENYL VINYL)-1,1′- BIPHENYL USING THE ATMOSPHERIC-PRESSURE SOLIDS ANALYSIS PROBE FOR IONIZATION",
pages = "1066-1063",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1897"
}

Nastasijević, B., Tomović, A., Jovanović, V. P., Žikić, R.,& Veličković, S.. (2014). ANALYSIS OF 4,4′-BIS(2,2′DIPHENYL VINYL)-1,1′- BIPHENYL USING THE ATMOSPHERIC-PRESSURE SOLIDS ANALYSIS PROBE FOR IONIZATION. in PHYSICAL CHEMISTRY 2014 (Proceedings, Volume III)
Society of Physical Chemists of Serbia., 1063-1066.
https://hdl.handle.net/21.15107/rcub_rimsi_1897

Nastasijević B, Tomović A, Jovanović VP, Žikić R, Veličković S. ANALYSIS OF 4,4′-BIS(2,2′DIPHENYL VINYL)-1,1′- BIPHENYL USING THE ATMOSPHERIC-PRESSURE SOLIDS ANALYSIS PROBE FOR IONIZATION. in PHYSICAL CHEMISTRY 2014 (Proceedings, Volume III). 2014;:1063-1066.
https://hdl.handle.net/21.15107/rcub_rimsi_1897 .

Nastasijević, Branislav, Tomović, Aleksandar, Jovanović, Vladimir P., Žikić, Radomir, Veličković, Suzana, "ANALYSIS OF 4,4′-BIS(2,2′DIPHENYL VINYL)-1,1′- BIPHENYL USING THE ATMOSPHERIC-PRESSURE SOLIDS ANALYSIS PROBE FOR IONIZATION" in PHYSICAL CHEMISTRY 2014 (Proceedings, Volume III) (2014):1063-1066,
https://hdl.handle.net/21.15107/rcub_rimsi_1897 .