Polymorphism dependent triplet-involved emissions of a pure organic luminogen

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英文篇名：Polymorphism dependent triplet-involved emissions of a pure organic luminogen 作者：Zihan ; He ; Wenbo ; Li ; Gan ; Chen ; Yongming ; Zhang ; Wang-Zhang ; Yuan 英文作者：Zihan He;Wenbo Li;Gan Chen;Yongming Zhang;Wang-Zhang Yuan;School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University; 英文关键词：Polymorphism;;Room temperature phosphorescence;;Pure organic luminogens;;Thermally activated delayed fluorescence;;Triplet-involved emissions 中文刊名：FXKB 英文刊名：中国化学快报(英文版) 机构：School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University; 出版日期：2019-04-15 出版单位：Chinese Chemical Letters 年：2019 期：v.30 基金：financially supported by the National Natural Science Foundation of China (Nos. 51822303, 51473092) 语种：英文; 页：FXKB201904023 页数：4 CN：04 ISSN：11-2710/O6 分类号：135-138

摘要

Polymorphism has been frequently used in tuning the singlet emissions of pure organic dyes. The modulation of triplet-involved emissions, particularly room temperature phosphorescence(RTP),however, is scarcely reported. Herein, polymorphism is reported to tune the triplet-involved emissions of 2 CZBZL, a newly designed pure organic luminogen consisting of twisted benzil and two planar carbazole moieties. Other than the conventional modulation through changing molecular conformation and packing, vibration can also finely tune the triplet-involved emissions. Besides prompt fluorescence(PF),polymorph B with relatively extended conformation emits thermally activated delayed fluorescence(TADF), whereas the others(A, C–E) with similarly more twisted conformations generate predominant RTP or simultaneous DF and RTP. These results demonstrate the fascinating chance to regulate the tripletinvolved emissions through controlling conformation and vibration.
        Polymorphism has been frequently used in tuning the singlet emissions of pure organic dyes. The modulation of triplet-involved emissions, particularly room temperature phosphorescence(RTP),however, is scarcely reported. Herein, polymorphism is reported to tune the triplet-involved emissions of 2 CZBZL, a newly designed pure organic luminogen consisting of twisted benzil and two planar carbazole moieties. Other than the conventional modulation through changing molecular conformation and packing, vibration can also finely tune the triplet-involved emissions. Besides prompt fluorescence(PF),polymorph B with relatively extended conformation emits thermally activated delayed fluorescence(TADF), whereas the others(A, C–E) with similarly more twisted conformations generate predominant RTP or simultaneous DF and RTP. These results demonstrate the fascinating chance to regulate the tripletinvolved emissions through controlling conformation and vibration.

引文

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