Ultralong organic phosphorescence from isolated molecules with repulsive interactions for multifunctional applications
Xiaokang Yao,Huili Ma,Xiaoan Wang,He Wang,Qian Wang,Xin Zou,Zhicheng Song,Wenyong Jia,Yuxin Li,Yufeng Mao,Manjeet Singh,Wenpeng Ye,Jian Liang,Yanyun Zhang,Zhuang Liu,Yixiao He,Jingjie Li,Zixing Zhou,Zhu Zhao,Yuanyuan Zhang,Guowei Niu,Chen Yin,Shasha Zhang,Huifang Shi,Wei Huang,Zhongfu An +25 more
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TLDR
In this article , carboxyl groups were introduced into organic phosphors to enable the formation of repulsive interactions between isolated molecules and the matrix in rigid environment, and the experimental results show a phosphor with a record lifetime and quantum efficiency up to 3.16 s and 50.0% simultaneously under ambient conditions.Abstract:
Abstract Intermolecular interactions, including attractive and repulsive interactions, play a vital role in manipulating functionalization of the materials from micro to macro dimensions. Despite great success in generation of ultralong organic phosphorescence (UOP) by suppressing non-radiative transitions through attractive interactions recently, there is still no consideration of repulsive interactions on UOP. Herein, we proposed a feasible approach by introducing carboxyl groups into organic phosphors, enabling formation of the intense repulsive interactions between the isolated molecules and the matrix in rigid environment. Our experimental results show a phosphor with a record lifetime and quantum efficiency up to 3.16 s and 50.0% simultaneously in film under ambient conditions. Considering the multiple functions of the flexible films, the potential applications in anti-counterfeiting, afterglow display and visual frequency indicators were demonstrated. This finding not only outlines a fundamental principle to achieve bright organic phosphorescence in film, but also expands the potential applications of UOP materials. read more
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