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Permethylated-β-Cyclodextrin Capped CdTe Quantum Dot and its Sensitive Fluorescence Analysis of Malachite Green

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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.

The analytical mechanism of OMe-β-CD/QDs and its linear response to MG

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Acknowledgments

We are grateful to Dr. Xiao-hua Xiao from Sun Yat-sen University for his helpful advice. This work was supported by the National Natural Science Foundation of China (No.21275056).

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Authors and Affiliations

  1. School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China

    Yujuan Cao, Jiongling Wei, Wei Wu, Song Wang, Xiaogang Hu & Ying Yu

  2. Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China

    Yujuan Cao, Xiaogang Hu & Ying Yu

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  1. Yujuan Cao
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  2. Jiongling Wei
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  3. Wei Wu
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  4. Song Wang
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Correspondence to Yujuan Cao.

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Cao, Y., Wei, J., Wu, W. et al. Permethylated-β-Cyclodextrin Capped CdTe Quantum Dot and its Sensitive Fluorescence Analysis of Malachite Green. J Fluoresc 25, 1397–1402 (2015). https://doi.org/10.1007/s10895-015-1630-1

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  • DOI: https://doi.org/10.1007/s10895-015-1630-1

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