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Lanthanide phosphonates: Synthesis, thermal stability and magnetic characterization

Abstract: Series of novel organic?inorganic hybrids materials based on trivalent lanthanides (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) and 1,4-phenylbis(phosphonate) obtained under hydrothermal conditions either by oven heat or microwave irradiation. The anhydrous compounds containing La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, and Ho, are isostructural. However, the compounds based on Y, Er, Tm, Yb, and Lu are hydrated and their structures have not yet been solved. The series of compounds are characterized by PXRD, TEM, SEM-EDX and thermal analyses (TG-MS and DSC). TEM study show a variable particles size with a minimum mean-particle size of ca. 30 nm. These compounds exhibit unusual very high thermal stability. The size of particles and the thermal stability are depending on lanthanide(III) cation features. All the investigated materials show paramagnetic behaviour. The magnetic susceptibility data follow a Curie?Weiss laws with paramagnetic effective moments in good agreement with those expected for Ln3+ free ions.

 Autoría: Amghouz Z., García J.R., García-Granda S., Clearfield A., Rodríguez Fernández J., De Pedro I., Blanco J.A.,

 Fuente: Journal of Alloys and Compounds 536S (2012) S499-S503

 Editorial: Elsevier Ltd

 Año de publicación: 2012

 Nº de páginas: 5

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.jallcom.2011.12.029

 ISSN: 0925-8388,1873-4669

 Proyecto español: MAT2010-15094

 Url de la publicación: https://doi.org/10.1016/j.jallcom.2011.12.029

Autoría

AMGHOUZ, Z

GARCÍA, J. R.

GARCÍA-GRANDA, S.

CLEARFIELD, A.

BLANCO, J. A.