Direct demonstration of triplet excimer in purely organic room temperature phosphorescence through rational molecular design  

作　　者：Zhenjiang Liu Yu Tian Jie Yang Aisen Li Yunsheng Wang Jia Ren Manman Fang Ben Zhong Tang Zhen Li 

机构地区：[1]Institute of Molecular Aggregation Science,Tianjin University,Tianjin 300072,China [2]Joint School of National University of Singapore,Tianjin University,International Campus of Tianjin University,Binhai New City,Fuzhou 350207,China [3]Shenzhen Institute of Molecular Aggregate Science and Engineering,School of Science and Engineering,The Chinese University of Hong Kong,Shenzhen,Guangdong 518172,China [4]Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,Tianjin University,Tianjin 300072,China [5]Department of Chemistry,Wuhan University,Wuhan 430072,China [6]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Light(Science & Applications)》2022年第6期1218-1226,共9页光（科学与应用)（英文版）

基　　金：We are grateful to the National Natural Science Foundation of China(No.51903188);the Natural Science Foundation of Tianjin City(No.19JCQNJC04500);the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2020WNLOKF013);the starting Grants of Tianjin University and Tianjin Government;Independent Innovation Fund of Tianjin University for financial support.

摘　　要：Organic luminogens with room temperature phosphorescence(RTP)have been paid great attention and developed rapidly for their wide application values.Until now,the internal mechanism and source of phosphorescence are still obscure,especially for the relationship between molecular dimer and RTP emission.Hence,we designed and synthesized eight phenothiazine 5,5-dioxide derivatives to directly reveal how the monomer and dimer in packing affect the RTP behavior.Dimers with strongπ-πstacking(θ<20.66°;d<3.86A)lead to pure triplet excimer emission,while those with weakπ-πstacking(27.02°<θ<40.64°;3.84A<d<4.41A)contribute to dual RTP emissions of both monomer and triplet excimer.The valuable information of this work would promote the further development of this research field,as well as others in aggregate.

关 键 词：RTP EXCIMER RATIONAL 

分 类 号：TB34[一般工业技术—材料科学与工程]