文献类型：期刊文献

英文题名：A building-block design for enhanced visible-light switching of diarylethenes

作者：Zhang, Zhiwei[1,2];Wang, Wenhui[1,2];Jin, Peipei[3];Xue, Jiadan[3];Sun, Lu[4];Huang, Jinhai[1,2];Zhang, Junji[1,2];Tian, He[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;[4]Nankai Univ, Inst Modern Opt, Tianjin 300071, Peoples R China

年份：2019

卷号：10

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000486138700003)】；

基金：The project is supported by Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03) and the international cooperation program of Shanghai Science and Technology Committee (17520750100). The authors acknowledge the financial support from the NSFC (21420102004, 21878086) and the Fundamental Research Funds for the Central Universities (222201717003). Z. Z. and J. Z. thank C. D. and Q. Z. for assistance with the measurement of photoluminescence lifetimes.

语种：英文

摘要：Current development of light-responsive materials and technologies imposes an urgent demand on visible-light photoswitching on account of its mild excitation with high penetration ability and low photo-toxicity. However, complicated molecular design and laborious synthesis are often required for visible-light photoswitch, especially for diarylethenes. Worse still, a dilemma is encountered as the visible-light excitation of the diarylethene is often achieved at the expense of photochromic performances. To tackle these setbacks, we introduce a building-block design strategy to achieve all-visible-light photochromism with the triplet-sensitization mechanism. The simply designed diarylethene system is constructed by employing a sensitizer building-block with narrow singlet-triplet energy gap (Delta E-ST) to a diarylethene building-block. A significant improvement on the photochromic efficiency is obtained as well as an enhanced photo-fatigue resistance over those under UV irradiation. The balance between the visible-light excitation and decent photochromism is thus realized, promoting a guiding principle for the visible-light photochromism.