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pH‐Induced Fluorescence and Thermal Relaxation Rate Modulation in a Hydrazone Photoswitch
Author(s) -
Shao Baihao,
Aprahamian Ivan
Publication year - 2019
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201900119
Subject(s) - protonation , hydrazone , deprotonation , photoswitch , chemistry , photochemistry , fluorescence , derivative (finance) , organic chemistry , ion , physics , quantum mechanics , financial economics , economics
A recently developed family of bistable hydrazone‐based photochromic compounds open new possibilities for molecular machinists with their unique combination of properties. Herein we report on the effect of acid/protonation on the switching and fluorescence emission of a recently reported dimethyl amino hydrazone derivative ( 1 ). The fluorescence of 1 can be turned ON/OFF upon deprotonation/protonation cycles, and protonated 1 photoswitches efficiently. Meanwhile, acid catalysis leads to a dramatic acceleration of its thermal relaxation rate (from years to hours).