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Título:	Heterometallic copper(II) / lanthanide(III) carboxylate clusters based on pyridine-2,6-dimethanol as molecular magnetic refrigerants
Autor:	Dermitzaki, Despina; Lorusso, Giulia CSIC ORCID; Escuer, A.; Evangelisti, Marco CSIC ORCID ; Stamatatos, Theocharis C.; Perlepes, Spyros P.
Fecha de publicación:	2014
Citación:	ICMM 2014
Resumen:	Polynuclear 3d/4f –metal complexes (coordination clusters) have shown a remarkable ability to act either as Single-Molecule Magnets, mainly when the 4f metal ions are highly anisotropic and possess a significant spin, or as molecular magnetic refrigerants when the molecules have high-spin and are isotropic. For example, CuII/GdIII complexes are good candidates for molecular coolants because the GdIII ion has an isotropic 4f7 configuration and the CuII…GdIII magnetic interactions are generally ferromagnetic, leading to complexes with a large magnetocaloric effect. We have been employing the general carboxylate (RCO2-) / pyridine-2,6-dimethanol (pdmH2) ligand “blend” in CuII / LnIII chemistry (Ln = lanthanide) and have isolated families of clusters (Cu3Ln6, Cu4Ln4, Cu4Ln8, Cu15Ln7) depending on the reaction conditions (nature of R, solvent, crystallization method, …). The complexes have interesting magnetic properties and some of them exhibit promising low-temperature magnetocaloric effect. For example a -ΔSm value of ~22.2 J Kg-1K-1 has been found for cluster [Cu15Gd7(OH)6(CO3)4(O2CPh)19(pdm)3(pdmH2)3(H2O)2].
Descripción:	Resumen del trabajo presentado a la: "14th International Conference on Molecule-Based Magnets" celebrada en San Petersburgo (Rusia) del 5 al 9 de julio de 2014.-- et al.
URI:	http://hdl.handle.net/10261/122663
Aparece en las colecciones:	(ICMA) Comunicaciones congresos