The dark side of cyclooctatetraene(COT):Photophysics in the singlet states of“self-healing”dyes  

作　　者：Supphachok Chanmungkalakul Syed Ali Abbas Abedi Federico J.Hernández Jianwei Xu Xiaogang Liu 

机构地区：[1]Fluorescence Research Group,Singapore University of Technology and Design,Singapore 487372,Singapore [2]Department of Chemistry,University College London,London WC1H 0AJ,United Kingdom [3]Institute of Sustainability for Chemicals,Energy and Environment(ISCE2),Agency for Science,Technology and Research(A^(∗)STAR),Jurong Island 627833,Singapore

出　　处：《Chinese Chemical Letters》2024年第8期225-228,共4页中国化学快报（英文版）

基　　金：the support from the Ministry of Education;Singapore (MOE,No.MOET2EP10120-0007);A^(*)STAR under its Advanced Manufacturing and Engineering Program (No.A2083c0051);the SUTD Kickstarter Initiative (No.SKI 2021_01_01);supported by QMUL Research-IT for computational resources,and the ARCHER UK National Supercomputing Service (No.EP/X035859/1) via the Materials Chemistry Consortium;the Molecular Modelling Hub for computational resources,MMM Hub,which is partially funded by EPSRC (No.EP/T022213/1);Leverhulme Trust (No.RPG-2019-122) for funding

摘　　要：Cyclooctatetraene(COT)attachment to fluorophores(“self-healing”dyes)is known for quenching reac-tive triplet states via triplet-state energy transfer(TET),enhancing photostability.However,COT’s impact on singlet states remains unclear.Quantum calculations reveal that COT induces energy transfer to dark states in deep blue dyes while promoting photoinduced electron transfer(PET)and intersystem crossing(ISC)in visible dyes,potentially compromising brightness and/or photostability.To address this,we pro-pose the use of △E descriptor to optimize COT’s effects.Our findings uncover COT’s multifaceted impact.These insights will guide the development of superior triplet state quenchers and photostable dyes.

关 键 词：CYCLOOCTATETRAENE PHOTOSTABILITY Triplet state quencher Energy transfer Electron transfer 

分 类 号：TQ610.1[化学工程—精细化工]