Exploring the Performance Improvement of Magnetocaloric Effect Based Gd-Exclusive Cluster Gd60
Exploring the Performance Improvement of Magnetocaloric Effect Based Gd-Exclusive Cluster Gd60
复制标题
探索基于磁热效应的Gd专有簇Gd-60的性能提升
DOI：
10.1021/jacs.8b07841
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发表时间：
2018-09-12
影响因子：
15
通讯作者：
Xu, Yan
中科院分区：
文献类型：
--
作者：
Luo, Xi-Ming;Hu, Zhao-Bo;Xu, Yan
尽管由于Gd(III)的f(7)电子构型，Gd团簇在磁热效应(MCE)中具有广泛的潜在应用前景，但提高MCE的结构改进仍然是困难的。报道了乙腈原位水解的一种新方法，并在设计和合成高核度稀土簇合物时实现了小配体CH3COO-的缓慢释放。在溶剂热条件下分离得到一个大的稀土专有簇合物[Gd-60(CO3)(8)(CH3COO)(12)(mu(2)-OH)(24)(mu(3)-OH)(96)(H2O)(56)](NO3)(15)Br12(Dmp)(5)中心点30CH(3)OH中心点20Hdmp(1-Gd-60)。据我们所知，在已报道的高核度稀土簇合物中，簇1具有较高的金属/配体比(磁密度)和最大的磁熵变(在2K时，Delta S-m(Max)=48.0J kg(-1)k(-1)，Delta H=7T)。
Despite wide potential applications of Gd-clusters in magnetocaloric effect (MCE) owing to f(7) 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, [Gd-60(CO3)(8)(CH3COO)(12)(mu(2)-OH)(24)(mu(3)-OH)(96)(H2O)(56)] (NO3)(15)Br-12(dmp)(5)center dot 30CH(3)OH center dot 20Hdmp (1-Gd-60), 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 (-Delta S-m(max) = 48.0 J kg(-1) k(-1) at 2 K for Delta H = 7 T) among previously reported high-nuclearity lanthanide clusters.