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Selective Binding of Amino Acids on Europium‐Substituted Polyoxometalates and the Interaction‐Induced Luminescent Enhancement Effect
Author(s) -
Li HongWei,
Wang Yizhan,
Zhang Teng,
Wu Yuqing,
Wu Lixin
Publication year - 2014
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402091
Subject(s) - europium , polyoxometalate , chemistry , histidine , amino acid , hydrogen bond , titration , lysine , luminescence , arginine , combinatorial chemistry , stereochemistry , photochemistry , inorganic chemistry , molecule , organic chemistry , ion , biochemistry , materials science , catalysis , optoelectronics
Abstract A europium‐substituted polyoxometalate (K 13 [Eu(SiW 10 MoO 39 ) 2 ] ⋅ 28 H 2 O, EuSiWMo) can selectively bind to basic amino acids, namely, lysine, arginine, and histidine, and induce the emission enhancement of Eu 3+ 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 1 H NMR titration spectra of amino acids and time‐resolved fluorescence decay curves of EuSiWMo.