Water-soluble donor-acceptor-type fluorophore 15Nap-Cl having two trifluoromethyl groups and a Cl group on a 1,5-aminonaphthyridine framework was prepared. Fluorophore 15Nap-Cl showed strong solvatochromic fluorescence, and, as the solvent polarity increased, a bathochromic shift was observed accompanied by an increase in the fluorescence quantum yield. In addition, in the presence of amines such as ethylamine, diethylamine, and aniline, further considerable bathochromic shifts in the fluorescence were observed. Density functional calculations identified the source of the fluorescence behavior as exciplex formation between 15-Nap-Cl and the corresponding amine. The fluorescence behavior was exploited to fabricate a sensor that can identify various primary, secondary, and tertiary amines.

中文翻译：

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发射性萘啶衍生物的荧光性质和激基形成：用作胺的传感器。

制备在1，5-氨基萘啶骨架上具有两个三氟甲基和Cl基的水溶性供体-受体型荧光团15Nap-Cl。荧光团15Nap-Cl显示出很强的溶剂化变色荧光，并且随着溶剂极性的增加，观察到一个红变色变化，伴随着荧光量子产率的增加。另外，在存在诸如乙胺，二乙胺和苯胺之类的胺的情况下，观察到荧光中进一步显着的红移。密度泛函计算将荧光行为的来源确定为15-Nap-Cl与相应胺之间的激基复合物形成。利用荧光行为来制造可以识别各种伯，仲和叔胺的传感器。