7-Heaven: A series of 7-diethylaminocoumarin amides that exhibited strong fluorescence in THF, high-viscosity glycerol solution, and the solid state (powder) have been synthesized. The phenyl amide displayed enhanced fluorescence in the solid state relative to that in THF. The high-viscosity glycerol and solid states may restrict the rotation of the 7-diethylamino group, thereby leading to nonradiative deactivation and fluorescence enhancement.

中文翻译：

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一系列7-二乙基氨基香豆素酰胺化合物的高效溶液和固态荧光

7-天堂：已经合成了一系列在THF，高粘度甘油溶液和固态（粉末）中显示出强荧光的7-二乙基氨基香豆素酰胺。相对于THF，苯基酰胺在固态下显示出增强的荧光。高粘度的甘油和固态会限制7-二乙氨基的旋转，从而导致非辐射失活和荧光增强。