The Effect of Molecular Conformations and Simulated “Self‐Doping” in Phenothiazine Derivatives on Room‐Temperature Phosphorescence

作者：Mingxue Gao, Yu Tian, Xiaoning Li, Yanxiang Gong, Manman Fang, Jie Yang, Zhen Li · 发表于：Angewandte Chemie International Edition · 年份：2022 · DOI：10.1002/anie.202214908 · 被引用次数：101 · 研究领域：Luminescence and Fluorescent Materials、Organic Light-Emitting Diodes Research、Molecular Sensors and Ion Detection

The research of purely organic room-temperature phosphorescence (RTP) materials has drawn great attention for their wide potential applications. Besides single-component and host-guest doping systems, the self-doping with same molecule but different conformations in one state is also a possible way to construct RTP materials, regardless of its rare investigation. In this work, twenty-four phenothiazine derivatives with two distinct molecular conformations were designed and their RTP behaviors in different states were systematically studied, with the aim to deeply understand the self-doping effect on the corresponding RTP property. While the phenothiazine derivatives with quasi-axial (ax) conformation presented better RTP performance in aggregated state, the quasi-equatorial (eq) ones were better in isolated state. Accordingly, the much promoted RTP performance was achieved in the stimulated self-doping state with ax-conformer as host and eq-one as guest, demonstrating the significant influence of self-doping on RTP effect.