【摘 要】
：
A new heteropolyoxotungstate[(C2H4N2)4(P4Co3W4O28H6)(H2C2O4)]n with a threedimensional framework was hydrothermally synthesized.The compound crystallizes in a t
【机 构】
：
Products Quality Supervision and Inspection Institute of Jilin City,Key Laboratory of Polyoxometalat
论文部分内容阅读
A new heteropolyoxotungstate[(C2H4N2)4(P4Co3W4O28H6)(H2C2O4)]n with a threedimensional framework was hydrothermally synthesized.The compound crystallizes in a tetragonal system,space group 141/a with a = 17.1006(17),b = 17.1006(7),c = 10.7525(5)(A),V= 3144.2(2)(A)3,Z = 4,Dc = 3.795 g·cm3,F(000)= 3300,MoKα(λ = 0.71073(A)),μ = 16.460 mm-1,the final R =0.0335 and wR = 0.0776.In the heteropolyoxotungstate,tungsten-oxygen octahedra are linked by sharing two cis-vertexes into an infinite helical chain extending along the c axis.Cobalt atoms in the octahedral geometry act as the linkers of these chains,forming a three-dimensional framework.The cobalt and phosphorus atoms in the tetrahedral geometry play a role in stabilizing the threedimensional framework.Ethylenediamine molecules are polymerized into organic chains which locate in the interspaces of the framework in the way of interwinding with the W-O chains.
其他文献
A novel compound [(CNBz)2Im]2(TCNQ)3(CH3CN) ((CNBz)2Im = 1,3-bis(4-cyano-benzyl) imidazole cation, TCNQ-1 = 7,7,8,8-tetracyanoquinodimethanide anion) was synthe
The acidity constants of TAR in different water-organic solvent binary mixtures at 25℃ have been determined spectro-photometrically. DATa Analysis (DATAN) prog
The authors focused their attention on the establishment of a mesenchymal stem cell(MSC) model for screening traditional Chinese medicines(TCMs) so as to invest
The catalytic activity of Fe/ZSM-5 for the selective reduction of NO to N2 with methane in the presence of excess O2 was studied. Fe/ZSM-5 catalysts with variou
While circulating fluidized bed(CFB)reactor has many advantages over the more conventional turbulent fluidized bed(TFB)reactor,it does at least have one signifi
Cardiac ablation is an important modality of invasive therapy in modern cardiology, especially in the treatment of arrhythmias, as well as other diseases such a
The synthesis of carbon nanotubes (CNTs) via chemical vapour deposition of methane on NiO/γ-Al2O3 catalyst has been investigated. The reduction behavior of NiO
The properties of Pbn(n=2―30) clusters including binding energies, second differences in energy, and HOMO-LUMO gaps, especially fragmentation energies and ioni