Sol-gel incorporation of organometallic compounds into silica: Useful precursors to metallic nanostructured materials

• CARLOS DIAZ ^[1] ; MARIA LUISA VALENZUELA ^[2] ; DENISSE GARRIDO ^[1] ; PEDRO AGUIRRE ^[1]
  1. [1] Universidad de Chile

     Universidad de Chile

     Santiago, Chile

     
  2. [2] Universidad Andrés Bello

     Universidad Andrés Bello

     Santiago, Chile

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 57, Nº. 2, 2012, págs. 1115-1162
• Idioma: inglés
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• Resumen

  • Inclusion of the organometallic MLn = [HOC5H4N-Cp2TiCl][PF6] (1), HOC5H4N-W(CO)5 (2), HOC5H4N-Mo(CO)5 (3), [HOC6H4CH2CN-Cp2TiCl][PF6] (4), HOC6H4CH2CN-W(CO)5 (5) and HOC6H4CH2CN-Mo(CO)5 (6) into amorphous silica using the gelator precursor TEOS and N3P3{NH[CH2]3Si[OEt]3}6 afford the gels (MLn)(SiO2)n. The inorganic-organic hybrid nanocomposites were pyrolyzed under air at 800°C to give nanostructured metal oxides and/or metal pyrophosphates (phosphates) included in the silica matrices. The morphology of the monolithic nanocomposites exhibited a strong dependence on the gel precursor used being mainly laminar for those prepared using N3P3{NH[CH2]3Si[OEt]3} as gelator. TEM images show different shape and size such as circular nanoparticles, nanocables and agglomerates in some cases with sizes of 20 nm for the circular nanostructures, and diameter about 25 nm for the nanocables.