Transient photophysics of phenothiazine–thiophene/furan copolymers in solvents
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- 作者：Kang Meng ; Yingliang Liu ; Wenke Feng ; Qi Zeng ; Xiangjie Zhao ; Shufeng Wang ; Qihuang Gong
- 关键词：Picosecond ; Polymer ; Phenothiazine ; TICT
- 刊名：Journal of Photochemistry and Photobiology A: Chemistry
- 出版年：2010
- 出版时间：5 February 2010
- 年：2010
- 卷：210
- 期：1
- 页码：44-47
- 全文大小：450 K
文摘
The steady-state and transient photophysics of a series of newly synthesized phenothiazine-based conjugated polymers and copolymers with thiophene and furan moieties in solvents were investigated. Positive solvatochromism in emission spectra was observed in polar solvents due to excited-state intramolecular charge-transfer. The picosecond time-resolved spectra using streak camera revealed fast chain twisting motion at 10 ps, verified by solvent viscosity dependency. A non-radiative de-activate pathway is assigned to the non-planar conformation at excited state. This reveals a possible way for intramolecular energy loss in new polymer design for applications.