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Two hexanuclear lanthanide Ln6III clusters featuring remarkable magnetocaloric effect and slow magnetic relaxation behavior

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Abstract

Two novel hexanuclear lanthanide complexes [Ln6(L)2(acac)6(OH)4(NO3)2(CH3OH)2] (Ln = Gd (1), and Dy (2)) (Hacac = acetylacetone, H3L = N′-(2-hydroxy-3-methoxybenzylidene)-6-(hydroxymethyl)picolinohydrazide) were prepared by reaction of polydentate Schiff base H3L and β-diketonate salts Ln(acac)3·2H2O via a solvothermal method. The structures of compounds 1 and 2 were determined by single-crystal X-ray diffraction analysis, and they both contain a {Ln6} cluster in the center. Their magnetic properties are investigated and the results indicate that 1 features a remarkable magnetocaloric effect with a maximum magnetic entropy change (−ΔSm) value of 35.3 J kg−1 K−1 at 7.0 T and 2.0 K, while compound 2 exhibits slow magnetic relaxation behavior.

Graphical abstract: Two hexanuclear lanthanide Ln6III clusters featuring remarkable magnetocaloric effect and slow magnetic relaxation behavior

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Article information


Submitted
09 Jul 2020
Accepted
24 Sep 2020
First published
25 Sep 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Two hexanuclear lanthanide Ln6III clusters featuring remarkable magnetocaloric effect and slow magnetic relaxation behavior

W. Wang, C. Xue, R. Jing, X. Ma, L. Yang, S. Luo and Z. Wu, New J. Chem., 2020, Advance Article , DOI: 10.1039/D0NJ03442H

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