Issue 30, 2017

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

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

Supplementary files

Article information

Article type
Paper
Submitted
20 Jun 2017
Accepted
12 Jul 2017
First published
13 Jul 2017

Dalton Trans., 2017,46, 10023-10028

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, 46, 10023 DOI: 10.1039/C7DT02233F

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