文献类型：期刊文献

英文题名：Multichannel Delayed Emission Based on Anti-Kasha Excited State Intramolecular Proton Transfer

作者：Li, Tao[1,2];Ding, Bingbing[1,2];Chen, Zijin[3];Jiang, Ping[1,2];He, Zhenyi[1,2];Yan, Ruijian[1,2];Tian, He[1,2];Chen, Jinquan[3];Ma, Xiang[1,2]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Normal Univ, State Key Lab Precis Spect, Shanghai 200241, Peoples R China

年份：2025

卷号：13

期号：27

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20253018842629);WOS:【SCI-EXPANDED(收录号:WOS:001533587800001)】；

基金：The authors gratefully acknowledge the financial support from National Key Research and Development Program of China (2022YFB3203500), National Natural Science Foundation of China (22125803, T2488302, 22020102006, 22205062, 92156024, and 92356307), Science and Technology Commission of Shanghai Municipality (grant No. 24DX1400200), and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：anti-Kasha's rule; excited state intramolecular proton transfer; multichannel delayed emission; room-temperature phosphorescence; thermally activated delayed fluorescence

摘要：Multichannel luminescence has gained significant traction across diverse fields such as optics, electronics, biology, etc. However, achieving the selective manifestation of multichannel emissions, particularly those involving delayed emission like thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP), from a solitary molecule remains a formidable challenge. Herein, an innovative strategy based on excited-state intramolecular proton transfer (ESIPT) facilitates the transition between TADF and RTP. The intermolecular hydrogen bonds between 2-(2 '-hydroxyphenyl)benzothiazole (HBT) derivatives and polyvinyl alcohol (PVA) are utilized to modulate the ESIPT potential barrier. Only under excitation <370 nm, higher excited states are allowed to proceed to luminescence through ESIPT prior to transitioning to the lowest singlet states, defying Kasha's rule. Thus, the adjustment of the excitation wavelength allows for precise control over both the RTP of the enol configuration and the TADF of the keto configuration. Further addition of a third component, sulforhodamine B, achieves a red-shifted afterglow via energy transfer.