pH‐Induced Fluorescence and Thermal Relaxation Rate Modulation in a Hydrazone Photoswitch
pH‐Induced Fluorescence and Thermal Relaxation Rate Modulation in a Hydrazone Photoswitch
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DOI：
10.1002/cptc.201900119
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发表时间：
2019-06
期刊：
影响因子：
3.7
通讯作者：
Baihao Shao;I. Aprahamian
中科院分区：
文献类型：
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作者：
Baihao Shao;I. Aprahamian
最近开发的一系列基于双酰腙的光致变色化合物以其独特的性能组合为分子机械师开辟了新的可能性。本文报道了酸/质子化对最近报道的二甲基氨基腙衍生物（1）的开关和荧光发射的影响。在去质子化/质子化循环中，1的荧光可以被打开/关闭，并且有效地质子化1光开关。同时，酸催化导致其热弛豫速率急剧加速（从数年到数小时）。
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 of1can be turned ON/OFF upon deprotonation/protonation cycles, and protonated1photoswitches efficiently. Meanwhile, acid catalysis leads to a dramatic acceleration of its thermal relaxation rate (from years to hours).