3-(4-(Arylethynyl)phenyl)-7-(diethylamino)-2H-chromen-2-ones 1a‒1d were synthesized by Pd/Cu-catalyzed Sonogashira cross-coupling reactions. After the structural properties were examined by the X-ray crystal analysis, their photophysical properties including fluorescence properties in solid states were systematically studied. It was revealed that the pyrenyl derivative 1d showed high fluorescence quantum yield (Φ_F = 0.87) in a THF solution, and that the phenyl derivative 1a exhibited an intense fluorescence (Φ_solid = 0.15) even in a solid state. According to the TDDFT calculations, the HOMOs of compounds 1a and 1b are mainly located on the 3-(4-(arylethynyl)phenyl)-7-(diethylamino)-2H-chromen-2-one moieties, whereas on the aryl moieties for 1c and 1d. The electrochemical studies revealed that the compounds 1a and 1b underwent reversible 1e⁻ oxidations.

通过Pd/Cu催化的Sonogashira交叉偶联反应合成了3-(4-(Arylethynyl)phenyl)-7-(diethylamino)-2 H - chromen -2-ones 1a ‒ 1d。通过X射线晶体分析检查结构特性后，系统地研究了它们的光物理特性，包括固态荧光特性。据透露，在芘衍生物1D显示出高荧光量子产率（Φ _˚F 在THF溶液= 0.87），并且所述苯基衍生物1A表现出强荧光（Φ_固体 = 0.15），即使在固体状态。根据 TDDFT 计算，化合物1a的 HOMO和1B主要位于3-（4-（芳基乙炔基）苯基）-7-（二乙氨基）-2- ħ -色烯-2-酮基团，而在为芳基部分1C和1D。电化学研究表明，化合物1a和1b经历了可逆的 1e ^-氧化。