文献类型：期刊文献

英文题名：Amplifying dual-visible-light photoswitching in aqueous media via confinement promoted triplet-triplet energy transfer

作者：Wang, Wenhui[1,2];Yang, Weixin[1,2];Zhang, Zhiwei[1,2];Dai, Jinghong[1,2];Xu, Yisheng[3];Zhang, Junji[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, 130 Meilong Rd, Shanghai 200237, 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, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：15

期号：15

起止页码：5539

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20241215775780);WOS:【SCI-EXPANDED(收录号:WOS:001184979500001)】；

基金：This work was supported by NSFC (22122803, 22101084, 22378121), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), the international cooperation program of Shanghai Science and Technology Committee (17520750100), and the Fundamental Research Funds for the Central Universities (222201717003). JZ acknowledges Shanghai Natural Science Foundation Project (23ZR1479500). The authors wish to acknowledge Zhiyuan Zeng and Jingran Liu for help in micelle preparation.

语种：英文

外文关键词：Biomimetics - Cryptography - Energy transfer - Hybrid materials - Photochromism

摘要：Achieving visible-light photochromism is a long-term goal of chemists keen to exploit the opportunities of molecular photoswitches in multi-disciplinary research studies. Triplet-sensitization offers a flexible approach to building diverse visible-light photoswitches using existing photochromic scaffolds, circumventing the need for sophisticated molecular design and synthesis. Unfortunately, distance-dependence and environment-sensitivity of triplet-excited species remain as key challenges that severely impair sensitization efficiency and limit their practical availability. We present herein a nature-inspired nanoconfinement strategy in which a triplet-sensitized visible-light photoswitch/sensitizer system is assembled into nanoconfined micelles (d similar to 40 nm). A ca. 10-fold efficiency increase of triplet-triplet energy transfer for photochromism as well as an amplified fluorescence on/off contrast upon bi-directional visible-light excitation (470/560 nm) was achieved in full aqueous media. By virtue of this, the hybrid photoswitchable system is successfully applied for both flash information encryption and multiple dynamic cell imaging assays, further proving its versatility in materials and life science.