罗丹明类比色探针的合成及在Cu^(2+)检测中的应用  

Synthesis of rhodamine based colorimetric probe for the detection of Cu^(2+) ion

作　　者：高超颖[1] 杨杨[1] 王冬琪[1] 陈静[1] 刘景林[1] 

机构地区：[1]内蒙古民族大学化学化工学院,通辽028000

出　　处：《分析试验室》2016年第5期553-555,共3页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(21362020);内蒙古自治区自然科学基金项目(2014BS0205);内蒙古民族大学科学研究基金项目(NMD1311;NMDGP1403)资助

摘　　要：以4-硝基水杨醛和罗丹明B酰肼通过缩合反应合成了探针分子Rb NS。在50%(V/V)的乙腈-水溶液中,加入Cu^(2+)后探针溶液由无色变为粉红色,554 nm处的吸收强度显著增强。罗丹明探针在Cu^(2+)诱导下螺内酰胺结构开环,并形成1:1的络合物。在Rb NS-Cu^(2+)络合物溶液中加入S^(2-),溶液粉红色褪去,表明Rb NS对Cu^(2+)的识别过程是可逆的。在实际水体样品中,探针Rb NS对Cu^(2+)的检出限为1.16×10^(-6)mol/L。A colorimetric probe Rb NS has been synthesized by condensation of 4-nitrosalicylaldehyde and rhodamine B hydrazide. In 50% CH3CN-H2 O solution,the color changed from colorless to pink and the absorbance at 554 nm was significantly enhanced after the addition of Cu（2＋）. The response is due to the spirolactam opening processes and formation of a 1： 1 metal-ligand complex. Addition of S（2-） in the Rb NS-Cu（2＋）solution resulted in the color change from pink back to colorless,which showed that the binding process was chemically reversible. The detection limit of Cu（2＋）by Rb NS probe is as low as 1. 16 × 10（-6）mol / L in the natural water samples.

关 键 词：罗丹明 比色探针 吸收光谱 CU2+ S2- 

分 类 号：O657.3[理学—分析化学]