Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea.
New and Renewable Energy Research Center, Ewha Womans University, Seoul, 03760, Korea.
Angew Chem Int Ed Engl. 2023 Apr 3;62(15):e202301765. doi: 10.1002/anie.202301765. Epub 2023 Feb 28.
Photoswitchable materials have attracted considerable attention in various fields. Developing excellent solid-state dual-mode photoswitches is an important but challenging task. Herein, we propose a new strategy to construct an excited-state intramolecular proton transfer (ESIPT) inspired photoswitch (DiAH-pht) that possesses aggregation-induced emission (AIE) features and displays a fast molecular isomerization process characterized by dual-mode behavior in the solid state. Mechanistic studies indicate that introduction of a bulky group can create a folded molecular conformation that provides adequate volume to facilitate photoisomerization and the enhanced ESIPT effect can boost the isomerization process. The feasibility of our strategy was further demonstrated by the activated photoisomerization performance of the Schiff base derivatives. Furthermore, DiAH-pht shows good performance in the fields of dual-mode information encryption and high-density data storage.
光致变色材料在各个领域引起了相当大的关注。开发优秀的固态双模式光开关是一项重要但具有挑战性的任务。在此，我们提出了一种新的策略来构建受激发态分子内质子转移（ESIPT）启发的光开关（DiAH-pht），它具有聚集诱导发射（AIE）的特点，并在固态中表现出双模式行为的快速分子异构化过程。机理研究表明，引入大体积基团可以形成折叠的分子构象，提供足够的体积以促进光异构化，增强的 ESIPT 效应可以促进异构化过程。我们的策略的可行性还通过席夫碱衍生物的光致异构化性能得到了进一步证明。此外，DiAH-pht 在双模信息加密和高密度数据存储等领域表现出良好的性能。
