Resumo

DIAZ, CARLOS; VALENZUELA, MARÍA LUISA; BAEZ, RODRIGO  e  SEGOVIA, MARJORIE. SOLID STATE MORPHOLOGY AND SIZE TUNING OF NANOSTRUCTURED PLATINUM USING MACROMOLECULAR COMPLEXES. J. Chil. Chem. Soc. [online]. 2015, vol.60, n.4, pp.2716-2720. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072015000400016.

The macromolecular complexes Chitosan●(PtCl₂)_n and PSP-co-4-PVP●(PtCl₂)_n, were prepared from the respective polymer and PtCl₂ in metal:polymer molar ratios 1:1 and 1:5. Pyrolisis of the macromolecular complexes Chitosan●(PtCl₂)_n and PSP-co-4-PVP●(PtCl₂)_n at 800 °C under air affords cubic nanostructured Pt in the pure phase. The morphology of the pyrolityc products depends on the molar metal:polymer ratio; i.e. a "cotton" 3D shape for the 1:1 ratio and a 'foamy" 3D shape for the 1:5 ratio. On the other hand, the particle size depends on the polymer nature, obtaining Pt nanoparticles as small as 6 nm for the chitosan precursors in both molar ratio.

Palavras-chave : Nanoparticles; Solid State; Polymers; Plasmon.

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