Two Gd2 compounds constructed by 8-hydroxyquinoline Schiff base ligands: Synthesis,structure, and magnetic refrigeration |
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| Affiliation: | 1. Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, PR China;2. Shanxi Engineering Research Center of Humic Acid, Jinzhong 030619, PR China;3. Department of Chemistry, Hebei Normal University of Science & Technology, Qinhuangdao 066004, PR China;4. College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China;1. Scientific Research Department, Shijiazhuang University of Applied Technology, Shijiazhuang 050081, China;2. Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, PR China;3. College of Chemical Engineering, Guizhou University of Engineering Science, Bijie 551700, PR China;4. Department of Chemistry, Tianjin University, Tianjin, 300354, PR China |
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| Abstract: | Two new Gd2 compounds having formulae, [Gd2(hfac)4(L1)2] (1) and [Gd2(hfac)4(L2)2] (2) (hfac = hexafluoroacetylacetonate, HL1 = 2-[4-methylaniline-imino]methyl]-8-hydroxyquinoline and HL2 = 2-[(3,4-dimethylaniline)-imino]methyl]-8-hydroxyquinoline), have been successfully synthesized via applying two different 8-hydroxyquinoline Schiff base ligands, and further characterized by crystallography. Structural analysis shows that both of 1 and 2 are phenoxo-O bridged dinuclear complexes. The magnetic study reveal that 1 and 2 display cryogenic magnetic refrigeration properties with maximum − ΔSm = 17.66 J kg− 1 K− 1 at 2 K and 7 T for 1 and − ΔSm = 14.81 J kg− 1 K− 1 at 3 K and 7 T for 2. |
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