[3PS-227]
A Diacetylene-Integrated Cyanostilbene Luminogen for Programmable Multi-State Optical Responses
발표자이찬 (전북대학교)
연구책임자정광운 (전북대학교)
Abstract
A diacetylene-integrated cyanostilbene luminogen (DCL) was developed as a single-molecule system for multi-state optical responses. By combining aggregation-induced emission with photochemical and thermochromic properties, DCL achieves diverse optical states without multi-component structures. Irradiation of 365 nm light induces photoisomerization of the cyanostilbene unit, which results in quenched emission. In contrast, irradiation of 254 nm light initiates diacetylene polymerization, leading to strong visible absorption and subsequent emission suppression via Förster resonance energy transfer. After diacetylene polymerization, the resulting polymerized state exhibits temperature-dependent color changes. These light- and heat-induced transitions enable spatial encoding of distinct optical states in thin films for optical encryption, anticounterfeiting, and smart ink applications. This work was supported by the BK21 FOUR, Mid-Career Researcher Program (RS-2021-NR059321).