Abstract
The novel polyoxometalate ([As(8)V(13)NiClO(41)][Ni(en)(2)(H(2)O)][Ni(en)(2)])([Ni(en)(2)(H(2)O)(2)](0.5)).4H(2)O (1), which is the first example of a chainlike inorganic-organic hybrid polymer based on dimeric polyoxoanions linked by nickel complex fragments, has been synthesized in the system of As(2)O(3)-V(2)O(5)-H(2)C(2)O(4)-en-NiCl(2).6H(2)O-H(2)O under hydrothermal conditions and characterized by IR, TGA, elemental analysis, single crystal X-ray diffraction, XPS, and magnetic susceptibility studies, respectively. This compound crystallized in the triclinic space group P with a = 13.358(3) angstroms, b = 14.198(3) angstroms, c = 19.723(4) angstroms, alpha = 83.88(3) degrees, beta = 86.04(3) degrees, gamma = 64.66(3) degrees, V = 3360.2(2) angstroms(3), and Z = 2. Interestingly, the dimeric polyoxoanion contains two ([Ni(en)(2)(H(2)O)][As(8)V(13)NiClO(41)]) cluster units linked by Ni-O-As bonds and is a Ni-substituted [As(8)V(13)NiClO(41)] cluster supported by [Ni(en)(2)(H(2)O)] coordination fragment. The chainlike structure consists of ([Ni(en)(2)(H(2)O)][As(8)V(13)NiClO(41)])(2) dimeric polyoxoanions and [Ni(en)(2)] groups which are linked together through vertexes forming a unique one-dimensional polymer. The study of the magnetic susceptibility of 1 demonstrates the presence of antiferromagnetic interaction in 1.
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