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Updated: Aug 22, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Construction of a High Nuclear Gadolinium Cluster with Enhanced Magnetocaloric Effect through Structural Transition
Peng Hu1, Shanghua Li1, Linghui Cao2
1Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-power Nuclear Technology Collaborative Innovation Center, Hubei University of Science and Technology, Xianning, Hubei437100, China.
Abstract:
Starting from a dinuclear complex {Gd2(L)2(NO3)4(H2O)2}·2(CH3CN) (1) based on 2,6-dimethoxyphenol (HL), a nonanuclear cluster {Gd9(L)4(μ4-OH)2(μ3-OH)8(μ2-OCH3)4(NO3)8 (H2O)8}(OH)·2H2O (2) was obtained via modulating the amount of the ligand and base. Both of them have been structurally and magnetically characterized. Complex 1 decorates the Gd2 core bridged by double μ2-phenoxyl oxygen atoms and coordinated neutral CH3CN molecules, while 2 features the Gd9 core with a sandglass-like topology. Magnetic investigations reveal that the weaker antiferromagnetic interactions between adjacent metal ions exist in complex 2 than in 1, which is in agreement with the theoretical results. Meanwhile, the magnetocaloric effect with a maximum -ΔS m value changes from 27.32 to 40.60 J kg-1 K-1 at 2 K and 7 T.
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