文献类型：期刊文献

英文题名：Boosting ultralong organic phosphorescence performance by synergistic heavy-atom effect and multiple intermolecular interactions in molecular crystal

作者：Mao, Huiting[1,2,3,4];Gao, Jing[1,2];Zhao, Weijun[5];Wang, Tingting[1,2];Shan, Guo-Gang[1,2];Geng, Yun[1,2];Shao, Kuizhan[1,2];Wang, Xinlong[1,2];Su, Zhongmin[4]

机构：[1]Northeast Normal Univ, Fac Chem, Inst Funct Mat Chem, Changchun 130024, Peoples R China;[2]Northeast Normal Univ, Fac Chem, Natl & Local United Engn Lab Power Battery, Changchun 130024, Peoples R China;[3]Dalian Minzu Univ, Coll Life Sci, Dalian 116600, Peoples R China;[4]Jilin Univ, Coll Chem, Changchun 130012, Peoples R China;[5]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：10

期号：16

起止页码：6334

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20221712008060);WOS:【SCI-EXPANDED(收录号:WOS:000774763400001)】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (22175033) and Joint Fund Project of the Natural Science Foundation of Jilin Province (YDZJ202101ZYTS063).

语种：英文

外文关键词：Atoms - Bromine - Bromine compounds - Cryptography - Molecular crystals

摘要：Ultralong organic phosphorescent (UOP) luminogens are of great practical importance in the field of optoelectronics, however, it remains a significant challenge to construct materials with high phosphorescent yields (Phi(ph)) and long lifetimes simultaneously. We herein present a feasible molecular engineering strategy to boost the Phi(ph) and lifetime via a synergistic heavy-atom effect and methylation approach used to adjust the intrinsic photophysical processes and solid packing. As expected, efficient UOP with an enhanced Phi(ph) of 11.1% and an improved lifetime of 391 ms is obtained for BrMOPP consisting of one methyl moiety and bromine atom in the 5,5-dioxide phenothiazine skeleton, which is much better than that of reference luminogen without functional units (0.5%, 185 ms). Dense network packing formed through multiple intramolecular interactions along with a, b, and c axis directions provides the rigid molecular alignment in the three-dimensional framework, suppressing the nonradiative relaxation pathway. Combining with the efficient intersystem crossing induced by the bromine atom, the resulting phosphors with excellent Phi(ph) and long lifetime are achieved, and are successfully applied to anti-counterfeiting and data encryption. This study will provide a reasonable approach for further optimizing the UOP performance from the molecular level.