6–氨基异喹啉的荧光增强及在白光膜中的应用

Fluorescence enhancement of 6-aminoisoquinoline and its application in white light film

有机发光二极管(organic light-emitting diode,OLED)在新一代的照明、显示等领域有着广阔的应用前景。在OLED的制备中,蓝色荧光染料起着不可或缺的作用。使用苯磺酸(benzenesulfonic acid,BSA)将蓝色荧光染料6-氨基异喹啉(6-aminoisoquinoline,6-AIQ)质子化改性为6-AIQ-BSA,使其荧光量子效率从64.71%上升至85.84%。为制备高效的白光薄膜,利用桶状分子羟丙基-β-环糊精(hydroxypropyl-β-cyclodextrin,HP-β-CD)对6-AIQ-BSA实施了超分子包覆,以降低高浓度下荧光猝灭现象。实验表明,将6-AIQ-BSA@HP-β-CD与橙光染料DAST@HP-β-CD以1.7∶1比例混合可以实现白光发射,其CIE色坐标为(0.3324,0.3284)。该混合物薄膜具有白光性好,轻量和柔软等特点,在柔性发光器件中有着广阔的应用潜力。

Organic light-emitting diode(OLED)has important applications in the next generation of lighting,displays and related fields.Blue fluorescent dyes are essential for the fabrication of OLED.In this study,by protonating a blue fluorescent dye 6-aminoisoquinoline(6-AIQ)with benzenesulfonic acid(BSA),the fluorescence quantum yield was successfully increased from 64.71%to 85.84%.The 6-AIQ-BSA was further inserted into a barrel-shaped hydroxypropyl-β-cyclodextrin(HP-β-CD)molecule to form a supramolecular structure,which could reduce the fluorescence quenching at high concentrations.Experiments showed that white light emission could be achieved by mixing the 6-AIQ-BSA@HP-β-CD with orange light dye DAST@HP-β-CD in a ratio of 1.7 to 1,and its CIE color coordinates were(0.3324,0.3284).The prepared film has the characteristics of good white light emission,lightweight,and flexibility,which makes it has broad application potential in various light-emitting devices.