The effect of intermolecular interactions on photoluminescence of a porphyrin side-chain polymer |
| |
Authors: | Wang Hui Zhang Wei Yu Han-Cheng Huang Jin-Wang Lin Wei-Zhu and Ji Liang-Nian |
| |
Institution: | State Key Laboratory of Optoelectronic Materials and Technologies of Zhongshan University, Guangzhou 510275, China; Institute of Chemistry and Chemical Engineering of Zhongshan University, Guangzhou 510275, China |
| |
Abstract: | Photoluminescence properties and exciton decay dynamics in a porphyrin side-chain
polymer, polyporphyrin acrylate- acrylonitrile (abbreviated p(por)A-AN]), have
been investigated by femtosecond time-resolved photoluminescence spectroscopy. All
the luminescences of p(por)A-AN] films are due to the emissive decay of the
photoexcited singlet excitons in the porphyrins. The luminescence efficiencies and
lifetimes are increased for samples from pure films to dilute blend films. However,
they are increased as the intrachain concentration of the porphyrin sidechain groups
is decreased. The intrachain rotation motions of porphyrin sidechain groups result
in the initial ultrafast luminescence decays, which are much faster than those due
to the interchain interactions. All the samples show no significant red-shift and
broadening of the transient luminescence spectra. The interchain and intrachain
nonradiative exciton relaxation processes may play an important role in the
luminescence dynamics in the p(por)A-AN] films. The possible origin of different
intrachain and interchain dynamic behaviours in p(por)A-AN] films is discussed. |
| |
Keywords: | porphyrin side-chain polymer transient luminescence exciton dynamics |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|