飞秒时间分辨荧光法研究氰基取代的寡聚（对苯撑乙烯基）的聚集诱导发射。
Study of aggregation induced emission of cyano-substituted oligo (p-phenylenevinylene) by femtosecond time resolved fluorescence.
机构信息
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2011 May;78(5):1640-5. doi: 10.1016/j.saa.2011.01.056. Epub 2011 Feb 17.
The aggregation induced emission (AIE) mechanism of the cyano-substituted oligo (p-phenylenevinylene)1,4-bis [1-cyano-2-(4-(diphenylamino) phenyl) vinyl] benzene (TPCNDSB) is investigated by time resolved fluorescence technique. By reconstructing the time resolved emission spectra (TRES), it is found that in solvent of low polarity, the emission is mainly from the local emission (LE) state with high quantum yield, but in high polarity solvent, the emission is mainly from the intramolecular charge transfer (ICT) state, which is a relatively dark state, with low quantum yield. In crystal form, the restriction of transfer from LE state to ICT state results in efficient AIE.
通过时间分辨荧光技术研究了氰基取代的寡聚（对苯乙炔）1,4-双[1-氰基-2-（4-（二苯基氨基）苯基）乙烯基]苯（TPCNDSB）的聚集诱导发射（AIE）机制。通过重构时间分辨发射光谱（TRES），发现在低极性溶剂中，发射主要来自具有高量子产率的局域发射（LE）态，但在高极性溶剂中，发射主要来自分子内电荷转移（ICT）态，这是一个相对较暗的状态，量子产率较低。在晶体形式中，从 LE 态到 ICT 态的转移限制导致有效的 AIE。
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