Towards a new type of heterometallic system based on a paddle-wheel Ru-2 dimer: first results derived from the use of a high spin diruthenium(III, III) building block
Towards a new type of heterometallic system based on a paddle-wheel Ru-2 dimer: first results derived from the use of a high spin diruthenium(III, III) building block
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基于桨轮 Ru-2 二聚体的新型异金属系统：使用高自旋二钌 (III, III) 结构单元获得的第一个结果
DOI：
10.1039/c7qi00154a
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发表时间：
2017
影响因子：
7
通讯作者：
Liu Bin
中科院分区：
文献类型：
--
作者：
Yang Bing-Bing;Feng Li-Na;Fan Xiao-Meng;Zhang Kai-Xiang;Yang Jian-Hui;Liu Bin
据报道，一种新的简便策略用于合成同价磷酸二钌(III,III)。在 K+ 存在下组装同价 Ru2 单元和 Cu2+ 时，形成新的三金属磷酸盐 K2[{Cu(H2O)}2Ru2(PO4)4(H2O)2] (1)。在化合物1中，Ru2二聚体的Ru-Ru双键距离为2.3400 Å，具有高自旋基态S = 2，相邻的[Ru2(PO4)4(H2O)2]6−单元通过扭曲的四角锥Cu(H2O)2+离子连接，形成负层[{Cu(H2O)}2Ru2(PO4)4(H2O)2]n2n−。 Ru26+ 和 Cu2+ 之间通过 O-P-O 桥介导反铁磁耦合。详细的磁测量表明，化合物1在振荡敏感性方面表现出两步弛豫，并且温度低于14 K，在1.8 K时具有Hc = 24.9 kOe的大矫顽场。这是迄今为止报道的非羧酸盐二钌化合物中最高的Tc和Hc。
A new facile strategy has been reported for the synthesis of homovalent diruthenium(III,III) phosphates. On assembling the homovalent Ru2 units and Cu2+ in the presence of K+, new trimetallic phosphates, K2[{Cu(H2O)}2Ru2(PO4)4(H2O)2] (1), were formed. In compound 1, the Ru2 dimer showed a Ru–Ru double bond distance of 2.3400 Å with a high spin ground state S = 2, and neighboring [Ru2(PO4)4(H2O)2]6− units were linked via distorted tetragonal pyramid Cu(H2O)2+ ions, forming the negative layer [{Cu(H2O)}2Ru2(PO4)4(H2O)2]n2n−. Antiferromagnetic coupling was mediated between Ru26+ and Cu2+via O–P–O bridges. Detailed magnetism measurements demonstrated that compound 1 exhibited a two-step relaxation in oscillation susceptibilities, and an order below 14 K with a large coercive field of Hc = 24.9 kOe at 1.8 K. It is the highest Tc and Hc for the non-carboxylate diruthenium compounds reported to date.