A 蟺-Conjugated System with Flexibility and Rigidity That Shows Environment-Dependent RGB Luminescence

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• 作者：Chunxue Yuan ; Shohei Saito ; Cristopher Camacho ; Stephan Irle ; Ichiro Hisaki ; Shigehiro Yamaguchi
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：June 19, 2013
• 年：2013
• 卷：135
• 期：24
• 页码：8842-8845
• 全文大小：272K
• 年卷期：v.135,no.24(June 19, 2013)
• ISSN：1520-5126

文摘

We have designed and synthesized a 蟺-conjugated system that consists of a flexible and nonplanar 蟺 joint and two emissive rigid and planar wings. This molecular system exhibits respectively red, green, and blue (RGB) emission from a single-component luminophore in different environments, namely in polymer matrix, in solution, and in crystals. The flexible unit gives rise to a dynamic conformational change in the excited state from a nonplanar V-shaped structure to a planar structure, leading to a dual fluorescence of blue and green colors. The rigid and planar moieties favor the formation of a two-fold 蟺-stacked array of the V-shaped molecules in the crystalline state, which produces a red excimer-like emission. These RGB emissions are attained without changing the excitation energy.