Abstract Diethylaminocoumarin with imidazole as the bridge unit and phenyl rings appended was synthesized by conventional condensing method and routinely characterized by nuclear magnetic resonance and high resolution mass spectra technology. The absorption and emission behavior were studied in various polar environment. It exhibit highly emissive character in methanol with 89% emission quantum yield. In solid state, the fluorescence color shifts to yellow part with emission peak around 563 nm. Emission decay in solid state demonstrates the single index character of the excited dye molecules. Together with the conformation derived from single crystal structure, balanced driving force between regular and irregular packing trend leads to the highly emissive character.

中文翻译：

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咪唑桥连二乙氨基香豆素和二苯的发射位移

摘要 采用常规缩合法合成以咪唑为桥接单元并附有苯环的二乙氨基香豆素，并采用核磁共振和高分辨质谱技术进行常规表征。在各种极地环境中研究了吸收和发射行为。它在甲醇中表现出高发射特性，发射量子产率为 89%。在固态下，荧光颜色转移到黄色部分，发射峰在 563 nm 附近。固态发射衰减表明激发染料分子的单指数特性。加上源自单晶结构的构象，规则和不规则堆积趋势之间的平衡驱动力导致了高发射特性。