Citation:
GAO Zhu-Qing, LI Hong-Jin, M. Kirillov Alexander, GU Jin-Zhong. Syntheses, Crystal Structures and Magnetic Properties Properties of Cobalt(Ⅱ) and Manganese(Ⅱ) Coordination Polymers Constructed from 5-(Pyridin-4-yl)Isophthalate isophthalate Ligands[J]. Chinese Journal of Structural Chemistry,
;2014, 33(4): 626-634.
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Two coordination polymers, namely {[Co(L)(H2O)]·H2O}n (1) and [Mn(L)(phen)]n (2, H2L=5-(pyridin-4-yl)isophthalic acid, phen=1,10-phenanthroline), have been hydrothermally synthesized and characterized by elemental analysis, IR, TG, magnetic properties, and single-crystal X-ray diffraction. 1 belongs to the triclinic system, space group P1 with a=7.2188(7), b=10.0835(8), c=10.2069(7) Å, α=113.713(7), β=99.490(7), γ=104.516(8)°, V=628.24(9) Å3, C13H11NCoO6, Mr=336.16, Z=2, Dc=1.777 Mg/m3, μ(MoKα)=1.395 mm-1, F(000)=342, S=1.041, the final R=0.0381 and wR=0.0819 for 3744 observed reflections (I>2σ(I)) and R=0.0448 and wR=0.0874 for all data. 2 belongs to the monoclinic system, space group P2/c with a=12.9185(3), b=10.4343(2), c=31.7650(6) Å, β=101.282(2)°, V=4199.08(13) Å3, C50H30N6Mn2O8, Mr=952.68, Z=4, Dc=1.507 Mg/m3, μ(MoKα)=5.447 mm-1, F(000)=1944, S=1.128, the final R=0.1003 and wR=0.1052 for 8247 observed reflections (I>2σ(I)) and R=0.2595 and wR=0.2625 for all data. Single-crystal X-ray diffraction studies show that compound 1 features a 2D sheet structure based on a dicobalt(Ⅱ) subunit, which is further extended into a 3D metal-organic supramolecular framework by O-H…O hydrogen bond. Compound 2 also possesses a 2D sheet, which is held together into a 3D supramolecular architecture via C-H…O hydrogen bond and π-π stacking interactions. Magnetic studies for compound 2 show antiferromagnetic coupling between the adjacent metal centers, with J=-11.8 cm-1 and g=2.12 for 2.
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Keywords:
- coordination polymer,
- crystal structrue,
- magnetic properties
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