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

作者：Qian, Jun; Hu, Jingchun; Yoshikawa, Hirofumi; Zhang, Jinfang; Awaga, Kunio; Zhang, Chi^*

来源：Crystal Growth & Design, 2014, 14(5): 2288-2295.

DOI：10.1021/cg4019053

• METAL-ORGANIC FRAMEWORKS
• SINGLE-MOLECULE MAGNETS
• CRYSTAL-STRUCTURE
• MN-II
• PHOTOINDUCED MAGNETIZATION
• HYDROTHERMAL SYNTHESIS
• CURIE-TEMPERATURE
• MO-V
• HEXAMETHYLENETETRAMINE
• NETWORKS

A three-dimensional (3D) manganese-tungsten bimetallic coordination polymer (CP) {{[mu(5)-W(CN)(8)](2)[Mn-(HMTA)(1.5)](2)[Mn(HMTA)(H2O)(2)]}center dot 2H(2)O}(n) (CP-1) (HMTA =hexamethylenetetramine) is constructed by the reaction of the molecular building block [W(CN)(8)](3-) and tetradentate bridging ligand HMTA with d(5) 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 P2(1)/c space group, CP-1 possesses an infinite 3D framework and exhibits an unusual (4,5)-connected 4,5T7 topology with point symbol (3(2).6(2).7(2))(3.4(4).5(2).6(2).7)(4). The extended 3D structure is constructed by two-dimensional (2D) cyano-bridged corrugated -W-Mn2-W-Mn2-layers pillared via the [Mn1(HMTA)(H2O)(2)] units. The magnetic investigation indicates ferrimagnetic behavior for CP-1 because of the antiferromagnetic coupling between W-V(S = 1/2) and Mn-II (S = 5/2) centers mediated by cyano bridges.

• 出版日期2014-5
• 单位江苏大学