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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
引用本文:殷鹏飞,龚会平,李萍萍,刘正清,何佑秋.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[J].高等学校化学学报,2012,33(7):1432-1437.
作者姓名:殷鹏飞  龚会平  李萍萍  刘正清  何佑秋
作者单位:西南大学化学化工学院,重庆,400715
基金项目:发光与实时分析重庆市重点实验室(西南大学)项目
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25~1×104 ng/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.

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
收稿时间:2011-08-09

Fluorescence Spectrometry and UV-Vis Absorption Spectra Analysis of Interaction of Core-shell CdTe/CdS QDs with Palmatine Chloride and Its Applications
YIN Peng-Fei , GONG Hui-Ping , LI Ping-Ping , LIU Zheng-Qing , HE You-Qiu.Fluorescence Spectrometry and UV-Vis Absorption Spectra Analysis of Interaction of Core-shell CdTe/CdS QDs with Palmatine Chloride and Its Applications[J].Chemical Research In Chinese Universities,2012,33(7):1432-1437.
Authors:YIN Peng-Fei  GONG Hui-Ping  LI Ping-Ping  LIU Zheng-Qing  HE You-Qiu
Affiliation:(School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China)
Abstract: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.
Keywords:CdTe/CdS quantum dots  Fluorescence quenching method  UV-Vis spectra  Palmatine chloride
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