针对荧光素类染料单独使用中存在光响应范围窄、能量利用率低等问题,利用离子染料之间的静电作用力构建阴阳离子染料对光捕获体系,探究光捕获体系对交叉脱氢偶联(CDC)反应的催化性能及其影响因素。结果表明,染料间阴、阳离子的相互作用可形成稳定的光捕获体系,以阴、阳离子染料玫瑰红(RB)和吖啶橙(AO)为受体和供体构建了光捕获体系"D⁺_AOA^-_RB"(浓度为2×10^-5mol/L),其荧光共振能量转移(FRET)效率可达72%。光捕获体系的荧光共振能量转移(FRET)过程可有效拓宽光响应范围、提高受体光催化性能,"D⁺_AOA^-_RB"体系对CDC反应展现出优异的光催化性能,其光催化反应速率是以RB为催化剂时的1.60倍。

In response to the problems of narrow light response range and low energy utilization in the use of fluorescein dyes alone,anion-cation dye pair-based light capture system is constructed by utilizing the electrostatic interaction between ionic dyes.The catalytic performance of the system in the cross-dehydrogenative coupling (CDC) reaction and the corresponding influence factors are investigated.The results demonstrate that a stable light-harvesting system can be formed by the interaction between cationic and anionic dyes.A light-capturing system termed "D⁺_AOA^-_RB" with a concentration of 2×10^-5 mol·L^-1 is constructed through using Rose Bengal (RB),a cationic dye,and Auramine O (AO),an anionic dye as acceptor and donor,respectively.The fluorescence resonance energy transfer (FRET) efficiency of "D⁺_AOA^-_RB" reaches 72%.FRET process of the light capture system can effectively broaden the light response range and enhance the photocatalytic performance of the acceptor.The "D⁺_AOA^-_RB" system exhibits excellent photocatalytic performance for CDC reaction,and its photocatalytic reaction rate is about 1.60 times that of the catalyst with RB only.

胡金辉(1996-),男,硕士生,研究方向为精细化学品绿色合成,787683597@qq.com;赵强强(1987-),男,博士,副教授,研究方向为精细化学品绿色合成,通讯联系人,qqzhao@dhu.edu.cn。