Resumen

DIAZ, CARLOS; VALENZUELA, MARIA LUISA; GARRIDO, DENISSE  y  AGUIRRE, PEDRO. SOL-GEL INCORPORATION OF ORGANOMETALLIC COMPOUNDS INTO SILICA: USEFUL PRECURSORS TO METALLIC NANOSTRUCTURED MATERIALS. J. Chil. Chem. Soc. [online]. 2012, vol.57, n.2, pp.1115-1162. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072012000200021.

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.

Palabras clave : Sol-gel; Nanostructured; Nanocomposites; Pyrophosphates.

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