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Two GdIII complexes with different structures and magnetocaloric properties induced by metal ion sources

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Abstract

Two new GdIII complexes with the formulas of [Gd(ma)2(H2O)2]·2H2O (1) and {[Gd(ma)(ox)0.5(H2O)]·2H2O}n (2) (H2ma = DL-malic acid and H2ox = oxalic acid) have been successfully prepared by using Gd2O3 or Gd(NO3)3 as metal ion sources. Complex 1 exhibits a discrete mononuclear structure, while complex 2 displays a three-dimensional ‘layer-pillar’ structure with ox2− anions as pillars that are generated in situ. Magnetic studies suggest the presence of ferromagnetic couplings between the intramolecular or interlayer GdIII ions and large magnetocaloric effects with −ΔSmaxm = 32.1 J kg−1 K−1 (1) and 44.6 J kg−1 K−1 (2) for ΔH = 7 T. Therefore, they are good candidates as magnetic refrigerants.

Graphical abstract: Two GdIII complexes with different structures and magnetocaloric properties induced by metal ion sources

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The article was received on 03 Oct 2019, accepted on 22 Oct 2019 and first published on 23 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ04984C
New J. Chem., 2019, Advance Article

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    Two GdIII complexes with different structures and magnetocaloric properties induced by metal ion sources

    T. Zheng, X. Tian, L. Wu, S. Liu, S. Yao, K. He, H. Huang, J. Liao, J. Chen and H. Wen, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ04984C

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