Syntheses, structures and magnetic properties of two heterometallic carbonates: K2Li[Cu(H2O)2Ru2(CO3)4X2]·5H2O (X = Cl, Br)
Syntheses, structures and magnetic properties of two heterometallic carbonates: K2Li[Cu(H2O)2Ru2(CO3)4X2]·5H2O (X = Cl, Br)
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DOI：
10.1039/c3ce41029c
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发表时间：
2013-09
期刊：
影响因子：
3.1
通讯作者：
Yan-Yan Jia-Yan;B. Liu;Xuemei Liu;Jianhui Yang
中科院分区：
文献类型：
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作者：
Yan-Yan Jia-Yan;B. Liu;Xuemei Liu;Jianhui Yang
Self-assembly of Ru2(CO3)43− units and Cu2+ ions in the presence of halogen (Cl− or Br−) has resulted in two novel isomeric layered structural heterometallic carbonates, K2Li[Cu(H2O)2Ru2(CO3)4X2]·5H2O [X = Cl (1), Br (2)]. X-ray structural analysis reveals that complexes 1 and 2 contain a similar square-grid negative layer [Cu(H2O)2Ru2(CO3)4X2]n5n−, in which each Ru2(CO3)4X25− unit is linked by four Jahn–Teller distorted Cu(H2O)22+ ions in a cross mode and vice versa. The adjacent negative layers are connected by K–O, Li–O bonds, and hydrogen bonding, which led to the formation of a supramolecular 3D network structure. The two complexes show ferromagnetic coupling between the Ru2 dimer and the Cu2+ ion. Detailed magnetism measurement demonstrates that complex 1 exhibits soft magnetic ordering below 2.9 K coexistent with domain movement, and complex 2 shows long-range ferromagnetic ordering below 3.8 K.
