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Linking heterometallic Cu-Ln chain unit with 2-methylenesuccinate bridge to form 2D network exhibiting large magnetocaloric effect

Abstract

Four two-dimensional heterometallic Cu-Ln coordination polymers based on 2-methylenesuccinate acid (H2MSA) ligand, {[Ln2Cu(MSA)4(H2O)6]•2H2O}n (Ln=La(1); Gd (2); Tb (3); Dy (4))), have been obtained under hydrothermal conditions. Complexes 1-4 bear a feature of one-dimensional [Ln2Cu] chains linked by 2-methylenesuccinate (MSA2-) bridges to form a 2D layer structure. Magnetic studies suggest the presence of weak antiferromagnetic Gd⋯Gd coupling and weak ferromagnetic Cu⋯Gd coupling in the 1D [Gd2Cu] chain unit of 2. The magnetic entropy change (−ΔSm) reached 36.05(1) J K−1 kg−1 for 2, making it an attractive refrigerant for low-temperature applications.

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Supplementary files

Publication details

The article was received on 21 Feb 2017, accepted on 12 Apr 2017 and first published on 12 Apr 2017


Article type: Paper
DOI: 10.1039/C7CE00356K
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Linking heterometallic Cu-Ln chain unit with 2-methylenesuccinate bridge to form 2D network exhibiting large magnetocaloric effect

    Z. Li, C. Zhang, B. Zhai, J. Han, M. Pei, J. Zhang, F. Zhang, S. Li and G. Cao, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE00356K

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