posted on 2013-12-04, 00:00authored byJun Qian, Jingchun Hu, Jinfang Zhang, Hirofumi Yoshikawa, Kunio Awaga, Chi Zhang
Aqueous solution was introduced into
the self-assembly of water-insoluble
(Bu3NH)3[M(CN)8] (M = W, Mo) and
Mn(NO3)2·6H2O to afford two,
three-dimensional (3D) coordination polymers (CPs), {[μ8-MV(CN)8MnII2(H2O)2(CH3OH)][NO3]}n (M = W 1, Mo 2), while
polymer {[μ4-WV(CN)8MnII2(DMF)8](ClO4)}n (DMF = N,N-dimethylformamide)
(3) was crystallized from the reaction of (Bu3NH)3[W(CN)8] and Mn(ClO4)2·6H2O in DMF. All three CPs 1, 2, and 3 have been well-characterized by elemental
analysis, infrared spectra, single-crystal X-ray diffraction, as well
as thermogravimetric analysis. The single-crystal X-ray structural
analysis shows that both CPs 1 and 2 crystallize
in the monoclinic crystal system with space group of C2/c and possess the infinite 3D framework in an
unprecedented afm1 topology geometry, which is an
unreported 4-nodal 4,4,8,8-coordinated net with point symbol {411.612.85}{417.610.8}{45.6}4. Polymer 3 crystallizes
in the space group of P42/m as a 3D supermolecule structure, which is constructed by one-dimensional
(1D) cationic {[μ4-WV(CN)8MnII2(DMF)8]+}n chains linked via the hydrogen bonds. Magnetic susceptibility
measurements in the temperature range of 2–300 K reveal that
CPs 1 and 2 exhibit the similar typical
antiferromagnetic properties, while CP 3 shows the ferromagnetic
property.