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Selective Binding of Amino Acids on Europium-Substituted Polyoxometalates and the Interaction-Induced Luminescent Enhancement Effect

Authors

  • Dr. Hong-Wei Li,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421
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  • Dr. Yizhan Wang,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421
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  • Teng Zhang,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421
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  • Prof. Dr. Yuqing Wu,

    Corresponding author
    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421
    • State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421===

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  • Prof. Dr. Lixin Wu

    Corresponding author
    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421
    • State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012 (P. R. China), Fax: (+86) 0431-85193421===

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Abstract

A europium-substituted polyoxometalate (K13[Eu(SiW10MoO39)2]28 H2O, EuSiWMo) can selectively bind to basic amino acids, namely, lysine, arginine, and histidine, and induce the emission enhancement of Eu3+ significantly. The mechanism is attributed to electrostatic interactions and hydrogen bonds between basic residues of the amino acids and negative charges of EuSiWMo based on the 1H NMR titration spectra of amino acids and time-resolved fluorescence decay curves of EuSiWMo.

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