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Two hybrid lanthanide complexes exhibiting a large magnetocaloric effect and slow magnetic relaxation

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Abstract

Two isostructural lanthanide (Ln) hybrid complexes co-bridged by organic oxalate and inorganic hypophosphite, [Ln(oxa)(H2PO2)(H2O)2] (oxa = oxalate; Ln = Gd (1), Dy (2)), were solvothermally prepared with the goal of elucidating the role of a hybrid framework in the generation of novel molecular magnetic materials. The title compounds feature a two dimensional (2D) hybrid layer. The LnIII ions are octa-coordinated with distorted square antiprism geometry. The adjacent LnIII ions are co-bridged by hypophosphite and one type of oxalate ligand to form 1D hybrid chains, which are further linked by a second type of oxalate ligand to generate the resulting 2D framework. Magnetic investigations reveal that compound 1 features a large magnetocaloric effect with −ΔSmaxm = 46.60 J kg−1 K−1 (134.39 mJ cm−3 K−1), due to the combined advantages of organic oxalate and inorganic hypophosphite ligands, while compound 2 displays slow magnetic relaxation.

Graphical abstract: Two hybrid lanthanide complexes exhibiting a large magnetocaloric effect and slow magnetic relaxation

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Publication details

The article was received on 20 Jun 2017, accepted on 12 Jul 2017 and first published on 13 Jul 2017


Article type: Paper
DOI: 10.1039/C7DT02233F
Citation: Dalton Trans., 2017, Advance Article
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    Two hybrid lanthanide complexes exhibiting a large magnetocaloric effect and slow magnetic relaxation

    S. Han, J. Li, H. Liu and G. Wang, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT02233F

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