一种罗丹明-氨乙基邻苯二甲酰胺衍生物的设计合成及其对Cr^(3+)离子的荧光-比色检测  

Rhodamine-Pathalic Diamide Derivative for Colorimetric and Fluorescent “Turn-On” Detection of Cr^(3+)

作　　者：韩文[1] 杨运旭[1] 许太林 盛瑞隆[2] 李斌莲[1] 朱海波[1] 

机构地区：[1]北京科技大学化学与化学工程系,北京100083 [2]中国科学院上海有机化学研究所,上海200032

出　　处：《影像科学与光化学》2015年第2期144-153,共10页Imaging Science and Photochemistry

基　　金：国家自然科学基金(21372251);北京市自然科学基金(2112026);北京市大学生科技创新基金项目(13220055)资助

摘　　要：本文合成、表征了一种结构简单的罗丹明-氨乙基邻苯二甲酰胺衍生物(RP1)。研究发现,在多种金属阳离子存在的条件下,RP1在丙酮/水溶液中对Cr3+具有高度选择性识别性能,在荧光增强的同时对Cr3+有明显的目视比色响应,颜色由无色变为粉红色,而其它共存的金属阳离子无干扰。定量分析结果显示RP1对Cr3+的结合计量比为1∶1,结合常数为3.43×104L/mol。识别机理研究表明,Cr3+通过可逆的配位诱导螺环开环机制与RP1进行相互作用,而非通过催化水解机制进行。In this work,a Rhodamine-phthalic diamide derivative（RP1）was synthesized and characterized.It exhibited high selectivity to Cr3^＋ over other metal cations inaqueous solution,and the＂turn-on＂response could be easily detected by means of absorption and fluorescence spectra,furthermore,an obvious color change from colorless to pink could be spontaneouly observed.Quantitive results showed that the binding model of RP1 and Cr3^＋ was in 1∶1stoichiometry and the binding constant was 3.43×104 L/mol.Moreover,the mechanism study illustrated that the recognition of RP1 and Cr3^＋ went through a reversible coordination induced spiro-ring opening reaction,but not catalyzed hydrolysis of spiro-ring.

关 键 词：比色-荧光探针 罗丹明B 邻苯二甲酰胺 Cr^3+识别 

分 类 号：O621.22[理学—有机化学]