title: Permethylated-β-Cyclodextrin Capped CdTe Quantum Dot and its Sensitive Fluorescence Analysis of Malachite Green.
abstract: In the present work, the CdTe quantum dots were covalently conjugated with permethylated-β-cyclodextrin (OMe-β-CD) using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride as cross-linking reagent. The obtained functional quantum dots (OMe-β-CD/QDs) showed highly luminescent, water solubility and photostability as well as good inclusion ability to malachite green. A sensitive fluorescence method was developed for the analysis of malachite green in different samples. The good linearity was 2.0 × 10(-7)-1.0 × 10(-5) mol/L and the limit of detect was 1.7 × 10(-8) mol/L. The recoveries for three environmental water samples were 92.0-108.2 % with relative standard deviation (RSD) of 0.24-1.87 %, while the recovery for the fish sample was 94.3 % with RSD of 1.04 %. The results showed that the present method was sensitive and convenient to determine malachite green in complex samples. Graphical Abstract The analytical mechanism of OMe-β-CD/QDs and its linear response to MG.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China. caoyj@scnu.edu.cn.|Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China. caoyj@scnu.edu.cn.
authors.forename: Yujuan
authors.initials: Y
authors.lastname: Cao
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
authors.forename: Jiongling
authors.initials: J
authors.lastname: Wei
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.|Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Hu
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.|Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Yu
keywords: Fluorescence analysis; Malachite green; Permethylated-β-cyclodextrin; Quantum dots; Water and fish samples