Sensing mechanism of a new fluorescent probe for hydrogen sulfide: photoinduced electron transfer and invalidity of excited-state intramolecular proton transfer
Xiumin Liu, Yutai Qi, Shenhan Pu, Yi Wang, Ziqing Gao
Abstract
Our theoretical results show that the fluorescence quenching of DFAN is caused by PET mechanism and the large Stokes shift fluorescence emission of DFAH is not due to the ESIPT mechanism. Due to the absence of PET process, enol structure emits strong fluorescence, which is inconsistent with the fluorescence mechanism in the experiment.
Topics & Concepts
FluorescencePhotochemistryPhotoinduced electron transferIntramolecular forceEnolQuenching (fluorescence)ProtonChemistryExcited stateMechanism (biology)Electron transferAtomic physicsCatalysisStereochemistryOpticsBiochemistryQuantum mechanicsEpistemologyPhysicsPhilosophyPhotochemistry and Electron Transfer StudiesSulfur Compounds in BiologyAtmospheric chemistry and aerosols