Subtle structure tailoring of metal-free triazine luminogens for highly efficient ultralong organic phosphorescence  

Subtle structure tailoring of metal-free triazine luminogens for highly efficient ultralong organic phosphorescence

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作  者:Xuan Wang Nan Gan Mingxing Gu Kun Ling Chaoqun Ma Huili Ma Wei Yao Yujian Zhang Huifang Shi Zhongfu An Wei Huang 

机构地区:[1]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University(Nanjing Tech),Nanjing 211816,China [2]Department of Materials Chemistry,Huzhou University,Huzhou 313000,China [3]Shanxi Institute of Flexible Electronics(SIFE),Northwestern Polytechnical University(NPU),Xi'an 710072,China

出  处:《Chinese Chemical Letters》2019年第11期1935-1938,F0003,共5页中国化学快报(英文版)

基  金:supported by the National Natural Science Foundation of China(Nos.21875104 and 51673095);National Basic Research Program of China(973 Program,No.2015CB932200);Natural Science Fund for Distinguished Young Scholars(No.BK20180037);the Natural Science Fund for Colleges and Universities(No.17KJB430020);"High-Level Talents in Six Industries"(No.XCL-025)of Jiangsu Province;Nanjing Tech Start-up Grant(Nos.3983500158 and 3983500169);the High Performance Computing Centre of Nanjing Tech University for supporting the computational resources

摘  要:Ultralong organic phosphorescent materials have invoked considerable attention for their great potential in sensing,data encryption,information anti-counterfeiting and so forth.However,effective ways to achieve highly efficient ultralong organic phosphorescence(UOP)in metal-free organic materials remain a great challenge.Herein,we designed three isomers based on asymmetric triazines with various bromine substituted positions.Impressively,phosphorescence efficiency of p-BrAT in solid state can reach up to 9.7%with a long lifetime of 386 ms,which was one of the highest efficient UOP materials reported so far.Theoretical calculations further demonstrated that para-substitution exhibited the most effective radiative transition for triplet excitons.These results will provide an effective approach to achieving highly efficient UOP materials.Ultralong organic phosphorescent materials have invoked considerable attention for their great potential in sensing,data encryption,information anti-counterfeiting and so forth.However,effective ways to achieve highly efficient ultralong organic phosphorescence(UOP) in metal-free organic materials remain a great challenge.Herein,we designed three isomers based on asymmetric triazines with various bromine substituted positions.Impressively,phosphorescence efficiency of p-BrAT in solid state can reach up to 9.7% with a long lifetime of 386 ms,which was one of the highest efficient UOP materials reported so far.Theoretical calculations further demonstrated that para-substitution exhibited the most effective radiative transition for triplet excitons.These results will provide an effective approach to achieving highly efficient UOP materials.

关 键 词:Ultralong organic phosphorescence(UOP) ISOMERISM Crystal engineering H-AGGREGATION Intermolecular interactions 

分 类 号:O62[理学—有机化学]

 

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