作者:Shuai Tian、Huili Ma、Xuan Wang、Anqi Lv、Huifang Shi、Yun Geng、Jie Li、Fushun Liang、Zhong‐Min Su、Zhongfu An、Wei Huang
DOI:10.1002/anie.201901546
日期:2019.5.13
with ultralong lifetimes is attractive but challenging. Here we report a concise chemical approach to regulate the electronic configuration for phosphorescence enhancement. After the introduction of d–pπ bonds into a phenothiazine model system, a phosphorescence lifetime enhancement of up to 19 times was observed for DOPPMO, compared to the reference PPMO. A record phosphorescence lifetime of up to 876 ms
开发具有超长使用寿命的纯有机材料是有吸引力的,但具有挑战性。在这里,我们报告了一种简洁的化学方法来调节电子结构以增强磷光。在将吩噻嗪模型系统中引入d–pπ键后,与参比PPMO相比,DOPPMO的磷光寿命提高了19倍。在磷光吩噻嗪中获得了高达876 ms的记录磷光寿命。理论计算和单晶分析表明,d–pπ键不仅降低了T 1的(n,π*)比例的状态,但也赋予刚性分子环境多种分子间的相互作用,从而实现长寿命的磷光。这一发现对延长磷光寿命和扩大磷光材料的范围做出了宝贵的贡献。