Steady State and Time-Resolved Fluorescence Dynamics of Triphenylamine Based Oligomers with Phenylene/Thiophene/Furan in Solvents |
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Authors: | ZENG Qi LIU Ying-Liang MENG Kang ZHAO Xiang-Jie WANG Shu-Feng GONG Qi-Huang |
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Institution: | State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871 |
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Abstract: | 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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Keywords: | 78 47 Jc 78 40 Me 36 20 Ey |
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