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Citation: Jin-Yu ZHAO, Xue-Jin ZHANG, Xiao-Min YANG, Jiao-Jiao WEN, Yu-Peng HUA. Crystal Structures and Magnetic Refrigeration Properties of Two Gd2 Complexes[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(5): 921-929. doi: 10.11862/CJIC.2022.094 shu

Crystal Structures and Magnetic Refrigeration Properties of Two Gd2 Complexes

  • 1.

    Department of Chemistry, Taiyuan Normal University, Jinzhong, Shanxi 030619, China

  • 2.

    Ordos Institute of Technology, Ordos, Inner Mongolia 017000, China

  • Corresponding author: Yu-Peng HUA, yp_hua@126.com
  • Received Date: 24 September 2021
    Revised Date: 23 February 2022

Figures(7)

  • By utilizing a polydentate Schiff base ligand (H2L=pyridine-2-carboxylic acid (3, 5-di-tert-butyl-2-hydroxy-benzylidene)-hydrazide), reacting with Gd(dbm)3·2H2O (Hdbm=dibenzoylmethane) and Gd(NO)3·6H2O, respectively; two new Gd2 complexes formulated as [Gd2(L)2(dbm)2(C2H5OH)2] (1) and [Gd2(L)2(HL)2(DMF)]·2CH3CN (2) (DMF=N, N-dimethylformamide) have been obtained by using solvothermal method. The crystal structures and magnetic properties of the two Gd2 complexes have been systematically studied. The crystal structures study reveals that each eightcoordinate Gd3+ ion in 1 possesses a distorted triangular dodecahedron; the two central Gd(Ⅲ) ions are connected by two μ2-O, resulting in a rhombic-shaped Gd2O2 core. However, for 2, each central Gd(Ⅲ) ion is nine-coordinate and their coordination configurations can be described as distorted spherical capped square antiprism, and the two central Gd(Ⅲ) ions are connected by three μ2-O forming a triangular biconical-shaped Gd2O3 core. Magnetic investi-gations showed that the two Gd2 complexes displayed magnetic refrigeration properties with the magnetic entropy (-ΔSm) of 20.16 J·K-1·kg-1 for 1 and 17.14 J·K-1·kg-1 for 2 at ΔH=70 kOe and T=2.0 K. CCDC: 2111657, 1; 2111658, 2.
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