Steady State and Time-Resolved Fluorescence Dynamics of Triphenylamine Based Oligomers with Phenylene/Thiophene/Furan in Solvents
Zeng Qi; Liu Ying-Liang; Meng Kang; Zhao Xiang-Jie; Wang Shu-Feng; Gong Qi-Huang; Zeng Qi; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871; Liu Ying-Liang; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871; Meng Kang; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871; Zhao Xiang-Jie; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871; Wang Shu-Feng; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871; Gong Qi-Huang; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871
Журнал:
Chinese Physics Letters
Дата:
2009-07-01
Аннотация:
We investigate the photo-physical properties of a series of triphenylamine-based oligomers by steady-state and picosecond transient fluorescence measurements in solvents. The oligomers are composed alternatively with triphenylamine and phenylene/thiophene/furan group, bridged by vinyl group (PNB/PNT/PNF). Their fluorescence spectra show bathochromic phenomenon with solvent polarity and viscosity increasing. The fluorescence decays are bi-exponential for PNB and PNT, and tri-exponential for PNF in THF and aniline. The strong viscosity dependence suggests conformational relaxation along the PNF chain after photo excitation.
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