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.
出处
《影像科学与光化学》
CAS
CSCD
北大核心
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
作者简介
通讯作者，Email：yxyang@ustb．edu．cn（杨运旭）；
通讯作者，Email：rayleighl21@aliyun．com（盛瑞隆）
