Xu Wei, Yu Yaguo, Ji Xiaonan, Zhao Huarui, Chen Jinming, Fu Yanyan, Cao Huimin, He Qingguo, Cheng Jiangong
State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Changning Road 865, Shanghai, 200050, China.
Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Sciences, Yuquan Road 19, Beijing, 100039, China.
Angew Chem Int Ed Engl. 2019 Nov 4;58(45):16018-16022. doi: 10.1002/anie.201906881. Epub 2019 Sep 25.
The stability of pure organic room-temperature phosphorescent (RTP) materials in air has been a research hotspot in recent years. Without crystallization or encapsulation, a new strategy was proposed to obtain self-stabilized organic RTP materials, based on a complete ionization of a photo-induced charge separation system. The ionization of aromatic phenol 4-carbazolyl salicylaldehyde (CSA) formed a stable H-bonding anion-cation radical structure and led to the completely amorphous CSA-I film. Phosphorescent lifetimes as long as 0.14 s at room temperature and with direct exposure to air were observed. The emission intensity was also increased by 21.5-fold. Such an amorphous RTP material reconciled the contradiction between phosphorescence stability and vapor permeability and has been successfully utilized for peroxide vapor detection.
近年来，纯有机室温磷光（RTP）材料在空气中的稳定性一直是研究热点。在不进行结晶或封装的情况下，基于光诱导电荷分离体系的完全电离，提出了一种获得自稳定有机RTP材料的新策略。芳香酚4-咔唑基水杨醛（CSA）的电离形成了稳定的氢键阴离子-阳离子自由基结构，并导致了完全非晶态的CSA-I薄膜。在室温下直接暴露于空气中时，观察到磷光寿命长达0.14秒。发射强度也增加了21.5倍。这种非晶态RTP材料调和了磷光稳定性和透气率之间的矛盾，并已成功用于过氧化物蒸汽检测。
