Intramolecular charge transfer (ICT) based fluorescent reagents containing a dansyl fluorophore have been synthesized and characterized. The reagent 1 and its complex, 1+Hg2+ in sodium acetate buffer (pH 6.7) revealed considerable fluorescence enhancement (switched-on) in the presence of bovine serum albumin (BSA) with 10 ppb detection sensitivity. 1H NMR spectral analysis suggests complexation between 1 and Hg2+ ion involving the N,N-dimethylamino and carboxylic functions.
合成并表征了基于分子内电荷转移(ICT)的荧光试剂,其中包含dansyl荧光基团。试剂1及其在
醋酸钠缓冲液(pH 6.7)中的复合物1+Hg2+在存在
牛血清白蛋白(
BSA)时显示出显著的荧光增强(开启),其检测灵敏度为10 ppb。1H NMR谱分析表明,1与Hg2+离子之间存在复合,涉及N,N-
二甲氨基和羧基功能。