紫外-可见吸收光谱和荧光光谱研究壳核型CdTe/CdS量子点与盐酸巴马汀的相互作用及其分析应用  

Fluorescence Spectrometry and UV-Vis Absorption Spectra Analysis of Interaction of Core-shell CdTe/CdS QDs with Palmatine Chloride and Its Applications

作　　者：殷鹏飞[1] 龚会平[1] 李萍萍[1] 刘正清[1] 何佑秋[1] 

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《高等学校化学学报》2012年第7期1432-1437,共6页Chemical Journal of Chinese Universities

基　　金：发光与实时分析重庆市重点实验室(西南大学)项目(批准号:CSTC 2006CA8006)资助

摘　　要：合成了巯基乙酸(TGA)修饰的壳核型CdTe/CdS量子点(TGA-CdTe/CdS QDs),利用紫外-可见光谱和荧光光谱研究了TGA-CdTe/CdS QDs与盐酸巴马汀(PC)的相互作用机理.结果表明,在pH=7.4的Tris-HCl缓冲液中,QDs与PC相互作用后使QDs的荧光呈线性猝灭,并有良好的线性关系(r=0.997),线性范围为25～1×104ng/mL,检出限(3σ)为7.7 ng/mL.建立了一种快速简便、可定量测定PC的新方法.Core-shell CdTe/CdS quantum dots（QDs） were synthesized using mercaptoacetic acid as stabilizer.A novel method for the determination of palmatine chloride（PC） was developed based on the quenching of the fluorescence of CdTe/CdS QDs at an excitation wavelength of 340 nm.Fluorescence spectrometry and ultraviolet-visible（UV-Vis） absorption spectra were utilized to study the interaction between CdTe/CdS QDs and PC.With the optimum reaction conditions of pH=7.4 Tris-HCl buffer solution,the quenched fluorescence intensity of CdTe/CdS QDs was linearly proportional to the concentration of PC with a correlation coefficient of r=0.997,and the detection limits were in the range of 25—1×104 ng/mL and the detection limit（3σ） for PC was 7.7 ng/mL.This new method can quickly,simply,conveniently and quantitatively detemine PC.

关 键 词：CDTE/CDS量子点 荧光猝灭法 紫外-可见吸收光谱 盐酸巴马汀 

分 类 号：O657[理学—分析化学]