A Three-Dimensional Hetero-Bimetallic Coordination Polymer with Unusual (4,5)-Connected Topology and Ferrimagnetic Property Based on Octacyanotungstate and Polydentate Ligand

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• 作者：Jun Qian ; Jingchun Hu ; Hirofumi Yoshikawa ; Jinfang Zhang ; Kunio Awaga ; Chi Zhang
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：May 7, 2014
• 年：2014
• 卷：14
• 期：5
• 页码：2288-2295
• 全文大小：487K
• 年卷期：v.14,no.5(May 7, 2014)
• ISSN：1528-7505

文摘

A three-dimensional (3D) manganese鈥搕ungsten bimetallic coordination polymer (CP) {{[渭₅-W(CN)₈]₂[Mn(HMTA)_1.5]₂[Mn(HMTA)(H₂O)₂]}路2H₂O}_n (CP-1) (HMTA = hexamethylenetetramine) is constructed by the reaction of the molecular building block [W(CN)₈]^{3鈥?/sup> and tetradentate bridging ligand HMTA with d5 transition metal ion Mn2+. CP-1 has been unambiguously confirmed by Fourier-transform infrared spectroscopy, elemental analysis, thermogravimetric analysis, and single-crystal and powder X-ray diffraction. Crystallographic analysis reveals that, crystallizing in the monoclinic crystal system with P2₁/c space group, CP-1 possesses an infinite 3D framework and exhibits an unusual (4,5)-connected 4,5T7 topology with point symbol (32路62路72)(3路44路52路62路7)₄. The extended 3D structure is constructed by two-dimensional (2D) cyano-bridged corrugated -W鈥揗n2鈥揥鈥揗n2- layers pillared via the [Mn1(HMTA)(H₂O)₂] units. The magnetic investigation indicates ferrimagnetic behavior for CP-1 because of the antiferromagnetic coupling between WV (S = 1/2) and MnII (S = 5/2) centers mediated by cyano bridges.}