| Synthesis,Structural Characterization and Magnetocaloric Effect of a Butterfly [Co~Ⅱ_2Gd~Ⅲ_2] Cluster |
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| 引用本文： | 刘通,黄渊梅,邹华红,汪海玲,梁福沛.Synthesis,Structural Characterization and Magnetocaloric Effect of a Butterfly [Co~Ⅱ_2Gd~Ⅲ_2] Cluster[J].结构化学,2019,38(7). |
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| 作者姓名： | 刘通 黄渊梅 邹华红 汪海玲 梁福沛 |
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| 基金项目： | the National Natural Science Foundation of China;Guangxi Natural Science Foundation;Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials |
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| 摘 要： | 2-(2,3-Dihydroxpropyliminomethyl)6-methoxyphenol(H_3L), trimethylacetic acid(Hpiv), Gd(NO_3)3·6 H_2O and Co(NO_3)2·6 H_2O were reacted in Me OH to obtain a heterometallic tetranuclear cluster Gd_2Co_2(L)_2(μ_3-OH)_2(piv)_6]·2 Hpiv·2 CH_3OH(1). X-ray crystallographic analysis reveals that compound 1 was found to be a butterfly heterometallic tetranuclear cluster. The crystal(C_(64)H_(108)Co_2Gd_2N_2O_(28), Mr = 1785.88) belongs to the triclinic crystal system, space group P1 with a =11.9798(6), b = 12.0877(5), c = 15.0367(7) ?, α = 67.320(4)°, β = 81.583(4)°, γ = 75.201(4)°, V =1939.62(18) ?3, Z = 1, T = 293.15 K, R = 0.048 and w R = 0.144 for 16299 observed reflections with I 2σ(I). In magnetization study, heterometallic 1 exhibits magnetocaloric effect(MCE) of 14.75 J·kg~(-1)·K~(-1) at 2 K for ΔH = 5 T, while it does not show non-linear response of the ac-susceptibilities.
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