所属单位：材料科学工程学院
发表刊物：CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
项目来源：自选课题
关键字：Transient absorption spectroscopy, Ultrafast dynamics, Temperature-dependent, Polarity-dependent, In-tramolecular charge transfer state
摘要：The relaxation paths for triphenylamine(TPA)-2,3-dicyanopyrazino phenanthrene(DCPP), which has a pull-push structure, were investigated via steady-state, time-resolved spectroscopy involving transient absorption and time-correlated single photon counting. By changing the solvent polarity we found that an intramolecular charge transfer(ICT) state acting as a "bright" state was responsible for the fluorescence character of TPA-DCPP. Meanwhile, a "dark" state gradually appeared and competed with the ICT state. This was likely to be responsible for the polarity-dependent evolution of fluorescence intensity and fluorescence lifetime. The temperature-dependent fluorescence character of the TPA-DCPP in toluene exhibited ICT processes at high temperatures prior to the relaxation path from the initial excited state to the ground state. Our results provide useful insight into the optoelectronic properties of these kinds of molecules.
第一作者：钟秋霖
论文类型：期刊论文
卷号：33
期号：3
页面范围：2
ISSN号：1005-9040
是否译文：否
CN号：22-1183/O6
发表时间：2017-05-06