CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
artículos
Título:
Synthesis and spectroscopic 27Al NMR and Raman characterizationof new materials based on the assembly of [AlO4Al12(OH)24(H2O)12]7+isopolycation and CoCr and [AlMo6O24H6]3-Anderson heteropolyanions
Autor/es:
MERCEDES MUÑOZ, CARMEN I. CABELLO, IRMA L. BOTTO, GIULIANO MINELLI, MICKAEL CAPRON, CAROLE LAMONIER, EDMOND PAYEN
Revista:
JOURNAL OF MOLECULAR STRUCTURE
Editorial:
Elsevier
Referencias:
Año: 2007 vol. 841 p. 96 - 103
ISSN:
0022-2860
Resumen:
New advanced inorganic composite materials were prepared by combination of the polycation [AlO4Al12(OH)24(H2O)12]7+ with [AlO4Al12(OH)24(H2O)12]7+ with
heteropolyoxomolybdates of Anderson type structure with formula: `[XMo6O24H6]3- where X=Al(III), Co(III), and Cr(III). The synthesis
of these materials is performed by direct mixture of the isopolycation and heteropolyanions in a pH controlled aqueous solution. These
new materials were characterized by X-ray powder diffraction (XRD), 27Al nuclear magnetic resonance (NMR); vibrational (FT-IR and
Raman Microprobe) and UVvisible diffuse reflectance (UVvis-DR) spectroscopies and their stability was studied by thermal analysis
(TG-DTA). The NMR and Raman spectroscopies are useful to characterize these materials and to demonstrate that the Anderson structure
in the composite lattice is preserved. Likewise, XRD, Raman microprobe and UVvis-DR spectroscopic techniques achieve the further
characterization of thermal residues or intermediates. All results allow us to suggest that the evolution of properties depends on the
heteroatom nature in the Anderson structural units of these new materials.
of these materials is performed by direct mixture of the isopolycation and heteropolyanions in a pH controlled aqueous solution. These
new materials were characterized by X-ray powder diffraction (XRD), 27Al nuclear magnetic resonance (NMR); vibrational (FT-IR and
Raman Microprobe) and UVvisible diffuse reflectance (UVvis-DR) spectroscopies and their stability was studied by thermal analysis
(TG-DTA). The NMR and Raman spectroscopies are useful to characterize these materials and to demonstrate that the Anderson structure
in the composite lattice is preserved. Likewise, XRD, Raman microprobe and UVvis-DR spectroscopic techniques achieve the further
characterization of thermal residues or intermediates. All results allow us to suggest that the evolution of properties depends on the
heteroatom nature in the Anderson structural units of these new materials.
Raman Microprobe) and UVvisible diffuse reflectance (UVvis-DR) spectroscopies and their stability was studied by thermal analysis
(TG-DTA). The NMR and Raman spectroscopies are useful to characterize these materials and to demonstrate that the Anderson structure
in the composite lattice is preserved. Likewise, XRD, Raman microprobe and UVvis-DR spectroscopic techniques achieve the further
characterization of thermal residues or intermediates. All results allow us to suggest that the evolution of properties depends on the
heteroatom nature in the Anderson structural units of these new materials.
2006 Elsevier B.V. All rights reserved.2006 Elsevier B.V. All rights reserved.
Keywords: Inorganic composites; Heteropolyanions; Al13-isopolycation; 27Al MAS NMR; Raman microprobe; Oxidative desulfurization; Hydrotreatment catalystsInorganic composites; Heteropolyanions; Al13-isopolycation; 27Al MAS NMR; Raman microprobe; Oxidative desulfurization; Hydrotreatment catalysts