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Polyoxometalate Complexes of Anatase-Titanium Dioxide Cores in Water

Angewandte Chemie (International ed.), 2015-10, Vol.54 (42), p.12416-12421 [Peer Reviewed Journal]

2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim ;2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. ;2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ;ISSN: 1433-7851 ;EISSN: 1521-3773 ;DOI: 10.1002/anie.201501941 ;PMID: 25900431 ;CODEN: ACIEAY

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  • Title:
    Polyoxometalate Complexes of Anatase-Titanium Dioxide Cores in Water
  • Author: Raula, Manoj ; Gan Or, Gal ; Saganovich, Marina ; Zeiri, Offer ; Wang, Yifeng ; Chierotti, Michele R. ; Gobetto, Roberto ; Weinstock, Ira A.
  • Subjects: Acetal resins ; Anatase ; Clusters ; Electrode potentials ; electron transfer ; hybrid materials ; Ligands ; Nanocrystals ; nanostructures ; polyoxometalates ; Polyoxometallates ; Semiconductors ; Titanium dioxide
  • Is Part Of: Angewandte Chemie (International ed.), 2015-10, Vol.54 (42), p.12416-12421
  • Description: Polyoxometalate (POM) cluster anions are shown to serve as covalently coordinated ligands for anatase‐TiO2 nanocrystals, giving isolable assemblies uniquely positioned between molecular macroanions and traditional colloidal nanoparticles. Na+ salts of the water‐soluble polyanionic structures are obtained by reacting amorphous TiO2 with the 1 nm lacunary ion, Na7[α‐XW11O39] (X=P5+), at 170 °C, after which an average of 55 α‐PW11O397− clusters are found as pentadentate ligands for TiIV ions covalently linked to 6 nm single‐crystal anatase cores. The attached POMs are reversible electron acceptors, the reduction potentials of which shift in a predictable fashion by changing the central heteroatom, X, directly influencing a model catalytic reaction. Just as POM cluster anions control the reactivities of metal centers in molecular complexes, directly coordinated POM ligands with tunable redox potentials now provide new options for rationally controlling the reactions of semiconductor nanocrystals. Redox‐active ligands for TiO2: Polyoxometalate (POM) electron acceptors serve as covalently coordinated inorganic ligands for anatase‐TiO2 nanocrystals, giving assemblies positioned between molecular macroanions and traditional colloidal nanoparticles. The POM ligands have tunable redox potentials, providing options for controlling reactions of soluble metal oxide semiconductor nanocrystals.
  • Publisher: Weinheim: WILEY-VCH Verlag
  • Language: English
  • Identifier: ISSN: 1433-7851
    EISSN: 1521-3773
    DOI: 10.1002/anie.201501941
    PMID: 25900431
    CODEN: ACIEAY
  • Source: Alma/SFX Local Collection
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