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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/51265

Title: Synthesis and Characterization of -Titanium Phosphate/Propylamine Intercalation Compounds Containing Transition-Metal Ions
Author(s): Fernández Alfonso, María Belén Aurora
Trobajo Fernández, María del Camino
Salvado Sánchez, Miguel Ángel
Pertierra Castro, María del Pilar
García-Granda, Santiago
Rodríguez Fernández, Jesús
Blanco Rodríguez, Jesús Ángel
García, José R.
Keywords: Layered phosphates
Transition metals
Ion exchange
Issue date: 15-Mar-2005
Publisher: WILEY-VCH Verlag GmbH & Co.
Publisher version: http://dx.doi.org/10.1002/zaac.200570036
Citation: Z. Anorg. Allg. Chem., 631, p. 2174-2180 (2005); doi:10.1002/zaac.200570036
Format extent: p. 2174-2180
Abstract: Polycrystalline intercalated TiMxH2-nx(PO4)2·yC3H7NH2·wH2O compounds with transition metal (TM) ions (Mn+ = Co2+, Ni2+, Fe3+ or Cr3+) have been prepared by means of an indirect route and characterised using X-ray diffraction, scanning electron microscopy, chemical and thermal analysis, X-ray absorption and magnetic measurements. These novel pillared layered materials, which were obtained from the monoclinic (P21/c space group) alpha-Ti(HPO4)2·H2O phase, lose its crystallinity after intercalation. However, all the TM ions are octahedrally surrounded by 6 oxygen atoms, although the X-ray absorption spectra evidence a clear dependence on the temperature. Surprisingly, all the materials behave as paramagnetic down to 1.5 K, but they exhibit different colors, which means that they are optically active (Co2+: violet; Ni2+: pale green; Fe3+: yellow; Cr3+: dark green).
URI: http://hdl.handle.net/10651/51265
ISSN: 1521-3749
Sponsored: This work was supported by MEC (Spain), Re-search Projects Nos. MAT2002-04178-C04 and MAT2003-02940
Project id.: MAT2002-04178-C04
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