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Exploring the Performance Improvement of Magnetocaloric Effect Based Gd-Exclusive Cluster Gd60
Xi-Ming Luo1, Zhao-Bo Hu2, Qing-Fang Lin1
1College of Chemical Engineering , State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University , Nanjing 210009 , P. R. China.
Abstract:
Despite wide potential applications of Gd-clusters in magnetocaloric effect (MCE) owing to f7 electron configuration of Gd(III), the structural improvement in order to enhance MCE remains difficult. A new approach of the situ hydrolysis of acetonitrile is reported, and the slow release of small ligand CH3COO- is realized in the design and synthesis of high-nuclearity lanthanide clusters. A large lanthanide-exclusive cluster complex, [Gd60(CO3)8(CH3COO)12(μ2-OH)24(μ3-OH)96(H2O)56](NO3)15Br12(dmp)5·30CH3OH·20Hdmp (1-Gd60), was isolated under solvothermal conditions. To the best our knowledge, cluster 1 possesses the high metal/ligand ratio (magnetic density) and the largest magnetic entropy change (- Δ Smmax = 48.0 J kg-1 K-1 at 2 K for Δ H = 7 T) among previously reported high-nuclearity lanthanide clusters.
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