Engineering Stacks of V-Shaped Polyaromatic Compounds with Alkyl Chains for Enhanced Emission in the Solid State

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• 作者：Shoya Sekiguchi ; Dr. Kei Kondo ; Dr. Yoshihisa Sei ; Prof. Dr. Munetaka Akita and Dr. Michito Yoshizawa
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：June 6, 2016
• 年：2016
• 卷：55
• 期：24
• 页码：6906-6910
• 全文大小：2636K
• ISSN：1521-3773

文摘

A V-shaped bisanthracene derivative with three butyl groups formed two types of emissive solids that display bluish green and blue fluorescence (Φ_F=72 and 32 %, respectively), depending on the preparation conditions. The crystal and powder X-ray analyses reveal that the highly emissive solid adopts a head-to-head arrangement with discrete stacks of the anthracene moieties, whereas the moderately emissive solid adopts a head-to-tail arrangement without the stacks. The obtained molecular arrangements are transformed by thermal stimuli accompanying the change in fluorescence. Furthermore, large enhancements of dye emissions (12–45-fold) through highly efficient host–guest energy transfer were achieved in the solid state by adding minute amounts of various fluorescent dyes (e.g. rubrene and Nile red) to the V-shaped compound.