Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra

Strat, Mitachi; Buruiana, Emil; Dumitriu, Dan; Sandu, Andrei Victor; Gurlui, Silviu

Mitachi Strat, Emil Buruiana, Dan Dumitriu, Andrei Victor Sandu, Silviu Gurlui

Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra

Abstract:

The spectroscopic and photochemical properties of polyurethane coumarine (PUC) in dimethyl sulf-oxide (DMSO), thetra hydro furan (THF), dimethyl formamide (DMF) and film state were investigated at room temperature under one photon excitation. Photodimer products were formed via UV irradiation. Syn head-to-head and syn head-to-tail photodimers were formed under one-photon (broadband UV) irradiation in polar solvents. The spectral investigation of the photochemical products of PUC revealed efficient fluorescence emission in the spectral region 300-400 nm, attributed to the syn-head-to-tail dimers of PUC. The results show that under irradiation of l ] 310 nm photodimerization process are increased and under UV irradiation with l [ 260 nm, photocleavage degree have been evidenced, too. Fluorescence spectra analysis of PUC in polar and film-based solvents reveals another very important result. The 375nm fluorescence wavelength of the PUC (exciting beam 310 nm) is about 30 times more intense than the same maximum in THF and in DMF. This result indicates a new method to confirm that PUC film photodimerisation occurs especially at its surface.

Keywords:
polyurethane coumarin; photophysical properties; photochemical properties; one-photon excitation

Issue: 2017, Volume 68, Issue 7

Pages: 1568-1572

Publication date: 2017/8/15

https://doi.org/10.37358/RC.17.7.5718

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
STRAT, M., BURUIANA, E., DUMITRIU, D., SANDU, A.V., GURLUI, S., Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra, Rev. Chim., 68(7), 2017, 1568-1572.

Vancouver
Strat M, Buruiana E, Dumitriu D, Sandu AV, Gurlui S. Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra. Rev. Chim.[internet]. 2017 Jul;68(7):1568-1572. Available from: https://doi.org/10.37358/RC.17.7.5718

APA 6th edition
Strat, M., Buruiana, E., Dumitriu, D., Sandu, A.V. & Gurlui, S. (2017). Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra. Revista de Chimie, 68(7), 1568-1572. https://doi.org/10.37358/RC.17.7.5718

Harvard
Strat, M., Buruiana, E., Dumitriu, D., Sandu, A.V., Gurlui, S. (2017). 'Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra', Revista de Chimie, 68(7), pp. 1568-1572. https://doi.org/10.37358/RC.17.7.5718

IEEE
M. Strat, E. Buruiana, D. Dumitriu, A.V. Sandu, S. Gurlui, "Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra". Revista de Chimie, vol. 68, no. 7, pp. 1568-1572, 2017. [online]. https://doi.org/10.37358/RC.17.7.5718

Text
Mitachi Strat, Emil Buruiana, Dan Dumitriu, Andrei Victor Sandu, Silviu Gurlui,
Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra,
Revista de Chimie,
Volume 68, Issue 7,
2017,
Pages 1568-1572,
ISSN 2668-8212,
https://doi.org/10.37358/RC.17.7.5718.
(https://revistadechimie.ro/Articles.asp?ID=5718)
Keywords: polyurethane coumarin; photophysical properties; photochemical properties; one-photon excitation

RIS
TY - JOUR
T1 - Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra
A1 - Strat, Mitachi
A2 - Buruiana, Emil
A3 - Dumitriu, Dan
A4 - Sandu, Andrei Victor
A5 - Gurlui, Silviu
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2017
VL - 68
IS - 7
SP - 1568
EP - 1572
UR - https://doi.org/10.37358/RC.17.7.5718
KW - polyurethane coumarin
KW - photophysical properties
KW - photochemical properties
KW - one-photon excitation
ER -

BibTex
@article{RevCh2017P1568,
author = {Strat Mitachi and Buruiana Emil and Dumitriu Dan and Sandu Andrei Victor and Gurlui Silviu},
title = {Photophysical and Photochemical Properties of Polyurethane Coumarin Studied by Means of Electronic Spectra},
journal = {Revista de Chimie},
volume = {68},
number = {7},
pages = {1568-1572},
year = {2017},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.17.7.5718},
url = {https://revistadechimie.ro/Articles.asp?ID=5718}
}

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