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.