High-Yield Synthesis of Silver Nanoclusters Protected by DNA Monomers and DFT Prediction of their Photoluminescence Properties

Authors

  • Xuan Yang,

    1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
    2. Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, 100039 (P.R. China)
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    • These authors contributed equally to this work.

  • Linfeng Gan,

    1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
    2. Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, 100039 (P.R. China)
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    • These authors contributed equally to this work.

  • Lei Han,

    1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
    2. Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, 100039 (P.R. China)
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  • Prof. Erkang Wang,

    Corresponding author
    1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
    2. Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, 100039 (P.R. China)
    • State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
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  • Prof. Jin Wang

    Corresponding author
    1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
    2. Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, 100039 (P.R. China)
    3. College of Physics, Jilin University, Changchun, Jilin, 130012 (P.R. China)
    4. Department of Chemistry and Physics, State University of New York at Stony Brook, Stony Brook, NY 11794-3400 (USA)
    • State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, 130022 (P.R. China)
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  • This work was supported by the National Natural Science Foundation of China (grant numbers 21190040 and 11174105, and 973 Projects 2009CB930100 and 2010CB933600) and the National Science Foundation.

Abstract

original image

Basic evidence is provided for the benefits of using cytosine-rich DNA strands as scaffolds for fluorescent silver nanoclusters. The DFT-calculated fluorescence spectra of silver nanoclusters (AgNCs) protected by DNA monomers (dC, dA, dT, and dG) were in good agreement with the experimentally obtained spectra (see picture), showing that only the use of cytosine-rich DNA strands as scaffolds gives fluorescent nanoclusters.

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