Temperature-dependence of spectral and photophysical properties of polycyclic aromatic hydrocarbon derivatives of acetylene and buta-1,3-diyne

Małgorzata Szyszkowska , Irena Bylińska , Wiesław Wiczk

Abstract

Variable-temperature absorption and emission data over the range 80–300 K have been collected for acetylene and buta-1,3-diyne derivatives with polycyclic aromatic hydrocarbons as substituents, in 2-methyltetrahydrofuran (2-MeTHF). The influence of temperature on fluorescence lifetime and quantum yield has also been investigated. A strong coupling between solvation dynamics and solute structure is observed. Moreover, the dependency of fluorescence quantum yield on temperature indicates that the energy of activation of conformational changes for studied compounds is comparable or slightly larger than the activation energy of viscous flow of 2-MeTHF. Moreover, contrary to diphenyl derivatives of buta-1,3-diyne for which conformation changes are barrierless, polycyclic aromatic hydrocarbons derivatives are characterized by a relatively high activation energy.
Author Małgorzata Szyszkowska (FCh / DBCh / LP)
Małgorzata Szyszkowska,,
- Laboratory of Photobiophysics
, Irena Bylińska (FCh / DBCh / LP)
Irena Bylińska,,
- Laboratory of Photobiophysics
, Wiesław Wiczk (FCh / DBCh / LP)
Wiesław Wiczk,,
- Laboratory of Photobiophysics
Journal seriesJournal of Photochemistry and Photobiology A-Chemistry, ISSN 1010-6030, (A 25 pkt)
Issue year2018
Vol358
Pages236-245
Publication size in sheets0.5
Keywords in Englishacetylene and buta-1,3-diyne derivatives, absorption, fluorescence, temperature measurements, activation energy, excited state, conformational changes, polycyclic aromatic hydrocarbon
DOIDOI:10.1016/j.jphotochem.2018.03.025
URL https://doi.org/10.1016/j.jphotochem.2018.03.025
Languageen angielski
Score (nominal)25
ScoreMinisterial score = 25.0, 27-06-2018, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 27-06-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.625 (2) - 2016=2.493 (5)
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