as alkali, alkaline and transition had no influence. Within a wide pH range 5–12 R1 could selectively detect copper by interrupting ICT mechanism that results in CHEF. From Job’s plot analysis a 2:1 binding stoichiometry was revealed. The fluorescence response was linear in the range 1–10 × 10−9 M with detection limit 30 × 10−9 M. Association constant was determined as 1 × 1011 M−2 by Benesi-Hilderbrand
铜是必不可少的营养素。还会对人体健康造成过量危害。使用基于Schiff碱的光学探针R1,采用了一种简便的方法来检测痕量
铜。该探针通过苄基胺与
2-羟基-1-萘甲醛的席夫碱缩合反应合成,并通过单X射线衍射,1 H NMR和FTIR进行表征。通过在
DMSO和H 2 O(20:80,v / v)的混合物中筛选其荧光响应,R1仅在用
铜处理时才显示出明显的荧光增强。其他检查的
金属离子,例如碱
金属,碱
金属和过渡
金属没有影响。在很宽的pH范围内5–12 R1可以通过中断导致CHEF的ICT机制来选择性地检测
铜。从乔布斯的图分析中发现了2:1的
化学计量比。荧光响应在1–10×10 -9 M范围内呈线性,检测极限为30×10 -9M 。缔合常数通过Benesi-Hilderbrand图确定为1×10 11 M -2。作为一种快速响应的探针,它具有良好的重现性,可用于检测不同
水样中的
铜。