文献类型：会议论文

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

作者：张志伟[1];Wenhui Wang[1];Jinhai Huang[1];Junji Zhang[1];He Tian[1];

机构：[1]Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science & Technology;

会议论文集：中国化学会第二届全国光功能材料青年学者研讨会摘要集

会议日期：20201009

会议地点：中国江西南昌

语种：中文

中文关键词：Diarylethene;Visible light;Photochromism;Triplet-triplet energy transfer

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-driven photoswitches,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. We previously demonstrated a novel strategy to achieve all-visible-light photochromism with the triplet-sensitization mechanism.1 Herein, a build-block design was presented, in which the visible-light diarylethene is constructed by employing a novel sensitizer building-block with narrow singlet-triplet energy gap((35) EST) to the diarylethene building-block.2 A significant improvement on the photochromic efficiency is obtained in both solution and solids under irradiation with 420 nm as well as an enhanced photo-fatigue resistance over those under UV irradiation, promoting a novel guiding principle for the visible-light photochromism. This smart strategy may fulfill the requirements for further development and modulation of visible-light-driven photoswitches.