文献类型：期刊文献

英文题名：Triplet Exciplex Mediated Multi-Color Ultra-Long Afterglow Mate-rials

作者：Ma, Liangwei[1,2];Liu, Yiwei[1,2];Jin, Xin[1,2];Jiang, Tao[1,2];Zhou, Lei[1,2];Wang, Qiaochun[1,2];Tian, He[1,2];Ma, Xiang[1,2]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Key Lab Adv Mat, Meilong Road 130, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2025

卷号：64

期号：16

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20250817898646);WOS:【SCI-EXPANDED(收录号:WOS:001422728500001)】；

基金：Acknowledgements Text. We gratefully acknowledge the financial support from the National Key Research and Development Program of China (2022YFB3203500), NSFC (22125803, T2488302, 22020102006, 22305080, and 22101083), Science and Technology Commission of Shanghai Municipality (grant No.24DX1400200), China National Postdoctoral Program for Innovative Talents (BX20220106), and China Postdoctoral Science Foundation (2022 M721140), and Fundamental Research Funds for the Central Universities. We sincerely thank Dr. Menghui Jia at the Materials Characterization Center, ECNU Multifunctional Platform for Innovation, for his support in the TA experiment.

语种：英文

外文关键词：room-temperature phosphorescence; afterglow; bi-component; triplet exciplex

摘要：Organic long-lived phosphorescent materials demonstrating ultra-long photoluminescence have practical advantages owing to their flexible design and easy processability. However, the exact photophysical process underpinning the persistent-luminescent continues to elude full understanding, and the principles governing the compatibility of hosts and guests remain elusive. In this work, a new type of nonradiative energy transfer mechanism is proposed for the bi-component RTP system. Different from F & ouml;rster resonance energy transfer or Dexter-type energy transfer, this energy transfer mechanism primarily relies on a triplet exciplex to exchange the electron. This facilitates the formation of triplet excitons that are otherwise difficult to excite directly. An evaluation methodology is devised to gauge the potential of a specific dopant-host combination toward generating pronounced afterglow. According to this framework, the enhancement of the afterglow is proportional to the decrease in the activation energy (Delta G not equal) associated with the electron transfer reaction between the dopant and the host. Notably, when the Delta G not equal too larger, no observable afterglow occurs, as higher Delta G not equal values significantly impede the electron transfer reaction between the two components. Furthermore, the remarkable dependence of afterglow intensity on the dopant concentration renders the bi-component RTP system highly promising for applications requiring ultra-high sensitivity and broad-spectrum detection capabilities.