Resumo

DIAZ, CARLOS; VALENZUELA, MARIA LUISA  e  BOBADILLA, DANIELA. BIMETALLIC AU/AG METAL SUPERSTRUCTURES FROM MACROMOLECULAR METAL COMPLEXES IN SOLID-STATE. J. Chil. Chem. Soc. [online]. 2013, vol.58, n.4, pp.1994-1997. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072013000400019.

Novel bimetallic Au/Ag superstructures have been prepared from solid-state pyrolysis of the macromolecular complexes Chitosan(MLn/M'Ln)_n y PSP-4-PVPx( MLn/M'Ln)n with MLn = AuCl₃ and M'Ln = Ag(CF₃SO₃)The characterization was made from XRD (X-ray diffraction of powder), SEM and EDS analysis. Morphologies are influenced by both the nature of the polymer and the metal/polymer, molar ratio of the polymer precursor. EDS analysis suggests a core/shell Au/Ag structure for the materials. A probable mechanism of the formation of these superstructures is discussed. Although separated reports of metallic superstructures of Au or Ag have been recently described, the here reported are the first bimetallic Au/Ag.

Palavras-chave : Superstructures; Macromolecular complexes; metallic Au and Ag; Pyrolysis.

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