Pan Xiuhong, Lan Linfeng, Li Liang, Naumov Panče, Zhang Hongyu
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China.
Smart Materials Lab, New York University Abu Dhabi, 129188, Abu Dhabi, UAE.
Angew Chem Int Ed Engl. 2024 Apr 8;63(15):e202320173. doi: 10.1002/anie.202320173. Epub 2024 Feb 26.
Organic single crystals quickly emerge as dense yet light and nearly defect-free media for emissive elements. Integration of functionalities and control over the emissive properties is currently being explored for a wide range of these materials to benchmark their performance against organic emissive materials diluted in powders or films. Here, we report mechanically flexible emissive chiral organic crystals capable of an unprecedented combination of fast, reversible, and low-fatigue responses. UV-excited single crystals of both enantiomers of the material, 4-chloro-2-(((1-phenylidene)imino)methyl)phenol, exhibit a drastic yet reversible change in the emission color from green to orange-yellow within a second and can be cycled at least 2000 times. The photoresponse was found to depend strongly on the excitation intensity and temperature. Combining chirality, mechanical compliance, rapid emission switching, multiple responses, and writability by UV light, this material provides a unique and versatile platform for developing organic crystal-based materials for on-demand signal transfer, information storage, and cryptography.
有机单晶迅速成为用于发光元件的致密、轻质且几乎无缺陷的介质。目前正在对这些材料中的多种材料进行功能集成和发光特性控制的探索，以便将它们的性能与稀释在粉末或薄膜中的有机发光材料进行对比。在此，我们报道了具有机械柔韧性的发光手性有机晶体，它能够实现快速、可逆和低疲劳响应的前所未有的组合。该材料4-氯-2-(((1-亚苯基)亚氨基)甲基)苯酚的两种对映体的紫外激发单晶，在一秒内发射颜色从绿色急剧转变为橙黄色，且可循环至少2000次。发现光响应强烈依赖于激发强度和温度。这种材料结合了手性、机械柔韧性、快速发射切换、多种响应以及紫外光可书写性，为开发用于按需信号传输、信息存储和密码学的基于有机晶体的材料提供了一个独特且通用的平台。
