ABSTRACT Methyl 2-hydroxy-4-(5-methoxythiophen-2-yl)benzoate (MHmoTB) and methyl 2-hydroxy-4-(5-cyanothiophen-2-yl)benzoate (MHncTB) have been synthesized and their photophysical properties are investigated in various solvents. Introducing methoxy and cyano groups to 5 position of the thiophenyl moiety results in very unique characters in the luminescence properties depending on the substituted group. Compared with the unsubstituted MHTB, the methoxy group as electron donator enhances the quantum yield of the deep blue luminescence more than 9 times in methylene chloride, while do not present an apparent solvatochromic effect on the luminescence spectral feature. In contrast, the cyano group as electron withdrawer enhances the quantum yield slightly. However, the UV excitation (

中文翻译：

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2-羟基-4-(5-R-噻吩-2-基)苯甲酸甲酯的合成和光物理性质：量子产率和激发态质子转移（R = CHO和CN）

摘要 2-羟基-4-(5-甲氧基噻吩-2-基)苯甲酸甲酯 (MHmoTB) 和 2-羟基-4-(5-氰基噻吩-2-基)苯甲酸甲酯 (MHncTB) 已被合成，它们的光物理性质为在各种溶剂中进行研究。将甲氧基和氰基引入苯硫基部分的 5 位会产生非常独特的发光特性，这取决于取代的基团。与未取代的MHTB相比，甲氧基作为电子供体使二氯甲烷中深蓝色发光的量子产率提高了9倍以上，而对发光光谱特征没有明显的溶剂致变色效应。相比之下，氰基作为吸电子剂略微提高了量子产率。然而，紫外激发（