首页|The dark side of cyclooctatetraene(COT):Photophysics in the singlet states of"self-healing"dyes
The dark side of cyclooctatetraene(COT):Photophysics in the singlet states of"self-healing"dyes
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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 ΔE 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.
CyclooctatetraenePhotostabilityTriplet state quencherEnergy transferElectron transfer
Supphachok Chanmungkalakul、Syed Ali Abbas Abedi、Federico J.Hernández、Jianwei Xu、Xiaogang Liu
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Fluorescence Research Group,Singapore University of Technology and Design,Singapore 487372,Singapore
Department of Chemistry,University College London,London WC1H OAJ,United Kingdom
Institute of Sustainability for Chemicals,Energy and Environment(ISCE2),Agency for Science,Technology and Research(A*STAR),Jurong Island 627833,Singapore
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