异质双发色团二元体系作为用于极性调谐三重态-三重态湮灭上转换的高效三重态受体
Hetero-bichromophore Dyad as a Highly Efficient Triplet Acceptor for Polarity Tuned Triplet-Triplet Annihilation Upconversion.
作者信息
Liu Ya, Chen Kepeng, Yang Songqiu, Zheng Daoyuan, Ren Guanghua, Yang Yang, Zhao Jianzhang, Wei Donghui, Han Keli
机构信息
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , People's Republic of China.
University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China.
出版信息
J Phys Chem Lett. 2019 Aug 1;10(15):4368-4373. doi: 10.1021/acs.jpclett.9b01454. Epub 2019 Jul 22.
Triplet-triplet annihilation upconversion (TTA UC) was intensively investigated for developing efficient photosensitizers and emitters. But an emission wavelength tunable TTA UC system with only one emitter was rarely reported. A novel hetero-bichromophore dyad, HB-An, showing solvatochromic emission and high fluorescence quantum yields in weakly polar solvents (such as -hexane, dichloromethane (DCM), and so on) was used as triplet energy acceptor/emitter for polarity tuned TTA UC. A high TTA UC quantum yield up to 25% was achieved and the UC emission wavelengths can be fine-tuned from cyan to yellow by changing the media polarity. This information will be useful for constructing efficient emitting-light-tunable TTA UC system.
为了开发高效的光敏剂和发光体，人们对三重态-三重态湮灭上转换（TTA UC）进行了深入研究。但是，很少有报道称仅使用一种发光体的发射波长可调谐TTA UC系统。一种新型的异双发色团二元化合物HB-An，在弱极性溶剂（如正己烷、二氯甲烷（DCM）等）中表现出溶剂化显色发射和高荧光量子产率，被用作极性调谐TTA UC的三重态能量受体/发光体。实现了高达25%的高TTA UC量子产率，并且通过改变介质极性，UC发射波长可以从青色精细调节到黄色。这些信息将有助于构建高效的发光波长可调谐TTA UC系统。
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