文献类型：期刊文献

英文题名：Transient Activation Windows Program Adaptive Photochemical Responses

作者：Dai, Jinghong[1,2];Zhang, Zhiwei[1,2];Wang, Wenhui[1,2];Ding, Muhua[1,2];Pan, Fengpu[3];Zhang, Junji[1,2];Tian, He[1,2]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai, Peoples R China;[3]Tsinghua Univ, Shenzhen Int Grad Sch, Shenzhen, Peoples R China

年份：2026

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20262721028177);Scopus(收录号：2-s2.0-105043503094);WOS:【SCI-EXPANDED(收录号:WOS:001806565500001)】；

基金：This work is supported by National Natural Science Foundation of China (22378121, 22478118), Science and Technology Commission of Shanghai Municipality (24DX1400200), the Program of Introducing Talents of Discipline to Universities (B16017), the Fundamental Research Funds for the Central Universities (222201717003). JZ acknowledges Shanghai Natural Science Foundation Project (23JC1401700). ZZ acknowledges the Young Elite Scientists Sponsorship Program (2023) by the Chinese Chemical Society (CCS). The authors wish to acknowledge Bin Huang and Danfeng Ye for their help in the EPR and phosphorescence measurements.

语种：英文

外文关键词：charge-transfer complex; dissipative systems; temporally gated photochemistry; triplet-sensitization; visible-light photoswitching

摘要：Biological systems regulate photochemical functions through transient activation states that determine when a stimulus can produce a response. Inspired by this principle, we develop a temporally gated molecular platform in which dynamic pH evolution controls visible-light photochemistry. The system integrates a proton-responsive charge-transfer complex (CTC) sensitizer and a diarylethene photoswitch. Reversible protonation of the CTC enables chemical gating of triplet-sensitized photochromism, which further generates a transient activation window via coupling with a dissipative, pH-regulation network. As a result, identical optical stimuli lead to distinct outcomes depending on when they are applied during chemical evolution, effectively promoting chemical gating to temporal gating of molecular photoswitch. The progressive modulation of the sensitizer induces a time-dependent attenuation of photochemical responses, enabling adaptive behaviors reminiscent of visual fatigue in biological photo-reception.