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| Crystal Structures and Magnetic Refrigeration Properties of Two Gd2 Complexes |
| Author Name | Affiliation | E-mail | | ZHAO Jin-Yu | Department of Chemistry, Taiyuan Normal University, Jinzhong, Shanxi 030619, China | | | ZHANG Xue-Jin | Department of Chemistry, Taiyuan Normal University, Jinzhong, Shanxi 030619, China | | | YANG Xiao-Min | Department of Chemistry, Taiyuan Normal University, Jinzhong, Shanxi 030619, China | | | WEN Jiao-Jiao | Department of Chemistry, Taiyuan Normal University, Jinzhong, Shanxi 030619, China | | | HUA Yu-Peng | Ordos Institute of Technology, Ordos, Inner Mongolia 017000, China | yp_hua@126.com |
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| Abstract: 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 investigations 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. |
| Keywords: Gd2 complexes crystal structures magnetic properties magnetic refrigeration properties |
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| ZHAO Jin-Yu,ZHANG Xue-Jin,YANG Xiao-Min,WEN Jiao-Jiao,HUA Yu-Peng.Crystal Structures and Magnetic Refrigeration Properties of Two Gd2 Complexes[J].Chinese Journal of Inorganic Chemistry,2022,38(5):921-929. |
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