一种增色检测铜离子的新型罗丹明B衍生物探针  

Novel Colorogenic Probe of Rhodamine B Derivative for the Detection of Copper ion

作　　者：李紫凡[1] 梅岭[1] 向宇[1] 童爱军[1] 

机构地区：[1]清华大学化学系,北京100084

出　　处：《分析化学》2008年第7期915-919,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No200675043)资助项目

摘　　要：合成了一种新型罗丹明B衍生物,(5-醛基吡咯-2-酸乙酯)罗丹明B酰肼西夫碱(RHPS)。在含30%乙腈的Tris-HCl缓冲溶液(pH=7.0)中,该探针本身无色,加入铜离子后溶液很快变为粉红色,而对其它金属离子如铁、汞、铅和镁等都没有明显响应。该探针与铜离子的结合是一个可逆过程,因此可应用于环境中铜离子的快速实时检测,线性范围为1.0×10-7～6.0×10-6mol/L,检出限达1.2×10-8mol/L。A novel probe Rhodamine B hydride ethyl 5-formyl-1H pyrrole-2-carooxylate schiff base（RHPS） for naked-eye sensing of Cu^2＋ was synthesized.It showed significant enhancement of absorbance at 560 nm upon the addition of copper ion.The selectivity and sensitivity of RHPS to copper ion was very high.RHPS formed a 1∶1 complex in 30% acetonitrile/water with Cu^2＋,and the chelating was reversible.Limit of detection for copper ion in 30% acetonitrile/water buffered at pH=7.0 was found to be 1.2×10^-8 mol/L,with a linear range of 1.0×10^-7 mol/L-6.0×10^-6 mol/L Cu^2＋.Determination of copper ion in water and synthetic samples in the presence of various interfering metal ions was successfully carried out.

关 键 词：罗丹明B衍生物 铜离子 分子探针 

分 类 号：O657.3[理学—分析化学]