Resumen

DIAZ VALENZUELA, CARLOS; VALENZUELA, M. LUISA  y  ZUNIGA, LUIS. ROLE OF THE LINKING OF METALLIC CENTERS TO MACROMOLECULAR AND OLIGOMERIC SYSTEMS IN THE PYROLYTIC PRODUCTS. J. Chil. Chem. Soc. [online]. 2008, vol.53, n.1, pp. 1373-1376. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072008000100010.

Pyrolysis of the mixtures: [NP(0₂C₁₂H₈)]_n // AuCl(PPh₂) system (I) [NP(O₂C₁₂H₈)]_{0 8}[NP(OC₆H₄CH₂CN.{Ru])₂]₀₁₅ NP(OC₆H₅)10C₆H₄CH₂CN. [Ru] ₀.₀₅]_n // 'BuSiMe₂Cl system (II) and N₃P₃[NH(CH₂)₃Si(OEt)₃]₆// N₃P₃[OC₆H₄CH₂CN. TiCp₂Cl]₆(PF₆)₆ system (III) were studied in air and at 800 °C, and their products characterized. Nanostructured Au foams; Ru0₂ and Ti(P0₃)₃ islands deposited on SiP₂0₇ / P₄0₇ matrix respectively were obtained. System (I) affords similar results to the pyrolysis of the polyphosphazene having the AuCl(PPh₂) coordinated to the polymeric chain which can be attributed to a probable coordination of the Au fragments to the polymer during the heating process. In the system (II) the no presence of metallic nanostructures containing Si was attributed to the absence of Si ultraestructures due to the no cross-linking of the precursor by volatilization of the silicon molecular compound. In the system (III) the ciclic trimer acts each one as template for the formation of mesostructured products remaining separated at the micro level

Palabras llave : Polyphosphazenes; organometallic metallic; nanostructure.