Sensitive Detection of Luteolin Using Thioglycolic Acid-Capped Cadmium Telluride/Cadmium Sulphide Quantum Dots as the Fluorescent Probe

被引：8
|
作者：
Shen, Yizhong [1 ]
Liu, Shaopu [1 ]
Liu, Zhengqing [1 ]
He, Youqiu [1 ]
机构：
[1] Southwest Univ, Sch Chem & Chem Engn, Chongqing 400715, Peoples R China
来源：
SPECTROSCOPY LETTERS | 2013年 / 46卷 / 07期
基金：
中国国家自然科学基金;
关键词：
CdTe; Cds QDs; fluorescence quenching; luteolin; thioglycolic acid; PERFORMANCE LIQUID-CHROMATOGRAPHY; SEMICONDUCTOR NANOCRYSTALS; LUMINESCENT PROBES; FLAVONOIDS; CDSE; CDTE; ELECTROPHORESIS; CHRYSANTHEMUM; EXTRACT; DNA;
D O I：
10.1080/00387010.2012.755705
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A sensitive and simple method for the determination of luteolin (LTL) was developed based on the fluorescence quenching effect of LTL for thioglycolic acid-capped (TGA-capped) CdTe/CdS quantum dots (QDs). Under optimum conditions, a good linear relationship was obtained from 0.3 to 20.0 mu gmL(-1) with a correlation coefficient of 0.9972, and the detection limit was 7.2ngmL(-1). The fluorescence quenching mechanism has been proposed on the basis of electron transfer supported by ultraviolet-visible (UV-Vis) absorption, fluorescence (FL) spectroscopy. The proposed method was successfully applied to the determination of LTL in commercial capsules and human urine samples. It manifested several advantages such as high sensitivity, short analysis time, low cost, and ease of operation.
引用
收藏
页码：483 / 492
页数：10
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