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Solvent Effects on Linear and Multi-branched Bithiazole-based Derivatives Fluorescence Studied by Steady-state and Time-resovled Spectroscopy
Russian Journal of Physical Chemistry A  (IF0.691),  Pub Date : 2021-08-22, DOI: 10.1134/s0036024421080215
Shi, Fuwen, Ni, Minghao, Wang, Zhiquan, He, Nannan, Li, Xiang, Hua, Jianli, Li, Bo, Chen, Ye

Abstract

Steady-state absorption, emission, and time-resolved spectroscopy were utilized to study the dynamics of excited states of linear and multi-branched bithiazole derivatives in different solvents at room temperature. In the studied compounds, triphenylamine and bithiazole groups act as donor and acceptor, respectively. BTZ-I and II have similar linear molecular structures, while BTZ-III and BTZ-IV have multi-branched structures. The difference is that the donor and acceptor units are connected by a single bond or a triple bond, respectively. With increase in solvent polarity, the fluorescence spectra exhibit a red shift and the fluorescence lifetime increases. Our results suggest there is intra-molecular charge transfer (ICT) processes in these four samples.