一种水杨酰胺-罗丹明衍生物比色荧光双重响应识别铁离子  

A salicylamide-rhodamine derivatives for colorimetric and fluorescent sensing of iron

作　　者：柳森 胡家元 祝郦伟 LIU Sen;HU Jiayuan;ZHU Liwei(State Grid Zhejiang Electric Power Corporation Research Institute,Hangzhou 310014,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,杭州310014

出　　处：《南昌大学学报（理科版）》2024年第3期288-294,共7页Journal of Nanchang University(Natural Science)

基　　金：国网浙江省电力有限公司科技项目(5211DS20008D)。

摘　　要：设计合成了一种基于水杨酰胺-罗丹明衍生物RB-SA用于多种信号响应识别铁离子,通过1H NMR和13C NMR对其结构进行了表征。研究表明,该探针在水相中可对Fe^(3+)的比色及荧光双重信号响应识别。在Fe^(3+)的诱导下,探针RB-SA的螺内酰胺环由闭环转变为开环,在560 nm处出现新的吸收峰并且溶液颜色由无色变为红色。同时荧光信号开启,在587 nm处荧光强度随着Fe^(3+)的加入呈线性增强。探针RB-SA对Fe^(3+)表现出高的灵敏性,基于荧光光谱滴定数据最低检测限LOD达到10.3 nmol·L^(-1),络合常数为1.03×10^(4)(mol·L^(-1))-1。A new salicylamide ethyl rhodamine derivatives RB-SA for multiple signal sensing of Fe^(3+)was designed and synthesized,and its structure was characterized by 1H NMR and 13 C NMR.RB-SA shows colorimetric and fluorescent dual signal response toward Fe^(3+)over other tested metal ions in aqueous solution.With the addition of Fe^(3+),a new absorption peak appears at 560 nm with the color of the solution changing from colorless to red,which can be attributed to the spirolactam ring of probe RB-SA changing to the open form.Simultaneously,a new emission peak at 587 nm was observed with the fluorescent color changing from dark to red emission.Probe RB-SA shows a high sensitivity toward Fe^(3+)with the low detection limited(LOD)of 10.3 nmol·L^(-1),and the binding constant of 1.03×10^(4)(mol·L)-1.

关 键 词：罗丹明B 水杨酸 Fe^(3+)检测 荧光识别 显色识别 

分 类 号：O653[理学—分析化学]