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Journal of Coordination Chemistry Volume 66, 2013 - Issue 6
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Original Articles

Synthesis, structure and magnetic properties of a two-dimensional polymer based on sandwich-type tetra-cobalt(II)-substituted polyoxotungstate anions and 1-D potassium-chains

Yan-Hua Fan Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. China
,
Meng-Meng Li Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. China
,
Dong-Bin Dang Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. China
,
Yan Bai Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. ChinaCorrespondence[email protected]
,
Xiao-Zhen Li Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. China
,
Ya-Ping Zhao Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. China
&
Jing-Yang Niu Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, P.R. China
 show all
Pages 946-957 | Received 11 Jul 2012, Accepted 26 Sep 2012, Published online: 20 Mar 2013
 
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Abstract

A 2-D coordination polymer, (C7N4H16)2{NH(CH3)3}[{K(H2O)}4Na(H2O)5{Co4(H2O)2(B-α-PW9O34)2}]·2H2O (1), was hydrothermally synthesized and structurally characterized by IR spectroscopy, elemental analysis, X-ray powder diffraction, and X-ray single-crystal crystallography. Crystal structure analysis shows a triclinic space group Pī with a = 12.4677(8) Å, b = 12.5054(8) Å, c = 18.5745(1) Å, α = 73.3220(1)°, β = 87.1890(1)°, γ = 62.2710(1)°, and V = 2443.4(3) Å3. Sandwich-type tetra-cobalt(II)-substituted [Co4(H2O)2(B-α-PW9O34)2]10− of 1 consists of two trivacant Keggin [B-α-PW9O34]9− moieties and a rhomb-like Co4O16 unit. Each sandwich-type polyoxotungstate subunit connects 12 K(1) and K(2) centers from two adjacent 1-D K-chain units resulting in an interesting 2-D layer framework. Magnetic properties of 1 have been investigated.

Acknowledgments

This work was supported by the National Natural Science Foundation of China, the Natural Science Foundation of Henan Province, the Foundation of Henan Educational Committee of China, the Foundation for University Youth Key Teacher of Henan Province of China, and the Foundation Co-established by the Province and the Ministry of Henan University.

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