Static and Ultrafast Transient Photophysics of Mono- and Dual-Branched Triarylamines |
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| Authors: | LI Feng-Ming MENG Fan-Shun FENG Wen-Ke WANG Shu-Feng TIAN He GONG Qi-Huang |
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| Affiliation: | State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 Labs for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237 |
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| Abstract: | Mono- and dual-branched molecules, {4-[2-(4-benzothiazol-2-yl-phenyl)-vinyl]-phenyl}-(4-methoxy-phenyl)-phenyl-amine (BS1) and bis-{4-[2- (4-benzothiazol-2-yl-phenyl)-vinyl]-phenyl}-(4-methoxy-phenyl)-phenyl-amine (BS2), are investigated with one- and two-photon static spectroscopy, and the femtosecond fluorescence up-conversion technique. The molecules show branch-based fluorescence emission at low quantum yield. Ultrafast non-radiative decay on a picosecond time scale is found and is attributed to intramolecular charge-transfer bridged by the central triphenylamine. The two-photon absorption cross-sections of BS1 and BS2 are 19.1 and 19.4 GM, respectively. |
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| Keywords: | 82.53.Uv 82.53.-k |
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