Crystallization-induced phosphorescence of benzils at room temperature  

作　　者：GONG YongYang TAN YeQiang LI Hong ZHANG YiRen YUAN WangZhang ZHANG YongMing SUN JingZhi TANG Ben Zhong 

机构地区：[1]School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University [2]Department of Polymer Science and Engineering, Zhejiang University [3]Department of Chemistry, The Hong Kong University of Science & Technology [4]HKUST Shenzhen Research Institute

出　　处：《中国科学：化学》2013年第9期1202-1202,共1页SCIENTIA SINICA Chimica

摘　　要：Efficient room temperature phosphorescence(RTP)is rarely observed in pure organic luminogens.However,we have newly observed that benzil and its derivatives are nonluminescent in solvents and thin layer chromatography(TLC)plates,but become highly phosphorescent in crystal state at room temperature,exhibiting typical crystallization-induced phosphorescence(CIP)characteristics.The CIP phenomenon is ascribed to the restriction of intramolecular rotations in crystals owing to effective intermolecular interactions.Such intermolecular interactions greatly rigidify the molecular conformation and significantly decrease the nonradiative deactivation channels of the triplet excitons,thus giving boosted phosphorescent emission at room temperature.Efficient room temperature phosphorescence （RTP） is rarely observed in pure organic luminogens. However, we have newly observed that benzil and its derivatives are nonluminescent in solvents and thin layer chromatography （TLC） plates, but become highly phosphorescent in crystal state at room temperature, exhibiting typical crystallization-induced phosphorescence （CIP） characteristics. The CIP phenomenon is ascribed to the restriction of intramolecular rotations in crystals owing to effective intermolecular interactions. Such intermolecular interactions greatly rigidify the molecular conformation and significantly decrease the nonradiative deactivation channels of the triplet excitons, thus giving boosted phosphorescent emission at room temperature.

关 键 词：室温磷光 苯偶酰 诱导 结晶 相互作用 薄层色谱法 三线态激子 分子间 

分 类 号：O627.51[理学—有机化学]