两种荧光染料的光稳定性研究

The photostability of two fluorescent dyes

采用标准氙灯分别光照自制的苯乙烯吡啶盐阳离子荧光橘红DHEASPBr-C2和市售的阳离子荧光黄X-10GFF染色腈纶织物,探究两种染料的光稳定性。在染料0.05%(omf)条件下,阳离子荧光黄X-10GFF染色腈纶织物的荧光强度大于阳离子荧光橘红DHEASPBr-C2;在标准氙灯光照条件下,两只染料均发生不同程度的光褪色,前者略好于后者。采用量子化学中的密度泛函方法(DFT),通过量子化学理论计算以揭示两种染料光降解机理,表明阳离子荧光橘红DHEASPBr-C2因具有较多的活泼位点,更易在空气中发生光褪色。

Acrylic dyeings with self-made stilbene-type Fluorescent Orange DHEASPBr-C2 and commercial cationic Fluorescent Yellow X-10GFF are exposed to the xenon lamp respectively, and the photostability of these two fluorescent dyes are explored. Fluorescence intensity of Fluorescent Yellow X-10GFF dyeings is greater than that of Fluorescent Orange DHEASPBr-C2 dyeings with 0.05%（omf） of dyes. Light fading of two dyeings occurs under xenon light conditions, and the latter is more serious. The photodegradation mechanism of the two dyes is demonstrated with density functional theory（ DFT）. Light fading of cationic Fluorescent Orange DHEASPBr-C 2 occurs more likely due to its much more active sites.