title: Tetracarboxylate-based Co(II), Ni(II) and Cu(II) three-dimensional coordination polymers: syntheses, structures and magnetic properties.
abstract: Methylenediisophthalic acid (H(4)MDIP), as semi-rigid 'V'-shaped carboxylate ligands, react with CoO, NiO and Cu(NO(3))(2)·3H(2)O to give three novel coordination polymers [H(3)O](2)[Co(3)(MDIP)(2)]·2DMF (1), [Ni(2)(HMDIP)(μ(2)-OH)(H(2)O)(3)(DMF)]·4H(2)O·DMF (2) and [Cu(3)(MDIP)(μ(2)-OH)(2)(H(2)O)(4)]·6.5H(2)O (3) (DMF = N,N'-dimethylformamide). All compounds have been characterized by thermogravimetric analysis, IR spectroscopy, elemental and single-crystal X-ray diffraction analyses. Complex 1 is an unusual open anionic framework that is defined as the metal-organic replica of fluorite. Both 2 and 3 features a 3D open framework with one-dimensional elliptical channels and R- and L-helical chains, and their resulting frameworks can be rationalized as crb and pts topology respectively. An interesting feature of complex 3 is the presence of the linear Cu(3) units that is formed by carboxylate and μ(2)-hydroxyl groups linking three Cu(II) metal centers. Magnetic investigations indicate that ferromagnetic couplings are dominant in the three compounds.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China.
authors.forename: Shengqun
authors.initials: S
authors.lastname: Su
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Guo
authors.forename: Guanghua
authors.initials: G
authors.lastname: Li
authors.forename: Ruiping
authors.initials: R
authors.lastname: Deng
authors.forename: Shuyan
authors.initials: S
authors.lastname: Song
authors.forename: Chao
authors.initials: C
authors.lastname: Qin
authors.forename: Chengling
authors.initials: C
authors.lastname: Pan
authors.forename: Huadong
authors.initials: H
authors.lastname: Guo
authors.forename: Feng
authors.initials: F
authors.lastname: Cao
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.forename: Hongjie
authors.initials: H
authors.lastname: Zhang