Crystal Structure of a Highly Luminescent Slice Crystal Grown in the Vapor Phase: A New Polymorph of 2,5-Diphenyl-1,4-distyrylbenzene

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• 作者：Zengqi Xie ; Huan Wang ; Feng Li ; Weijie Xie ; Linlin Liu ; Bing Yang ; Ling Ye ; Yuguang Ma
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：December 2007
• 年：2007
• 卷：7
• 期：12
• 页码：2512 - 2516
• 全文大小：1101K
• 年卷期：v.7,no.12(December 2007)
• ISSN：1528-7505

文摘

We prepared a large slice crystal of trans-DPDSB with a regular shape by the physical vapor transport method and determined its crystal structure, which is different from the needle-like crystal grown in a mixture of chloroform and methanol. In the slice crystal, all of the molecules are packed in layer-by-layer mode with the same molecular orientation, and in one molecular layer, the molecules are packed in a “brick wall” motif (J-aggregate). The crystal has a very high luminescence efficiency of 48 ± 4%, attributed to the special molecular dipole stacking mode, and stimulated emission is observed under optical pumping.