ESIPT-Inspired Dual-Mode Photoswitches with Fast Molecular Isomerization in the Solid State

Yahui Chen, You Rim Lee, Wenjing Wang, Yu Fang, Sheng Lu, Jingjing Han, Xiaoqiang Chen, Myung Hwa Kim, Juyoung Yoon

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article numbere202301765
JournalAngewandte Chemie - International Edition
Issue number15
StatePublished - 3 Apr 2023


  • Aggregation-Induced Emission
  • Dual-Mode
  • Excited-State Intramolecular Proton Transfer
  • Information Encryption
  • Solid-State Photoswitches


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