Crystallization-Induced Phosphorescence of Pure Organic Luminogens at Room Temperature
Wang Zhang YuanDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinXiao ShenDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinHui ZhaoDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinJacky W. Y. LamDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinLi TangDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinPing LüDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinChunlei WangDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinLiu YangUniversity of Hong KongZhiming WangDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinQiang ZhengDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinJing SunDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinYuguang MaDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, JilinBen Zhong TangDepartment of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China, Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education of China, Zhejiang University, Hangzhou 310027, China, and State Key Laboratory of Supramolecular Structure and Materials, Jilin
2010en
ABI
Аннотация
Phosphorescence has rarely been observed in pure organic chromophore systems at room temperature. We herein report efficient phosphorescence from the crystals of benzophenone and its derivatives with a general formula of (X-C6H4)2C═O (X = F, Cl, Br) as well as methyl 4-bromobenzoate and 4,4′-dibromobiphenyl under ambient conditions. These luminogens are all nonemissive when they are dissolved in good solvents, adsorbed on TLC plates, and doped into polymer films, because active intramolecular motions such as rotations and vibrations under these conditions effectively annihilate their triplet excitons via nonradiative relaxation channels. In the crystalline state, the intramolecular motions are restricted by the crystal lattices and intermolecular interactions, particularly C−H···O, N−H···O, C−H···X (X = F, Cl, Br), C−Br···Br−C, and C−H···π hydrogen bonding. The physical constraints and multiple intermolecular interactions collectively lock the conformations of the luminogen molecules. This structural rigidification effect makes the luminogens highly phosphorescent in the crystalline state at room temperature.
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