Hydrothermal Synthesis and Characterization of a New Strandberg-Type Polyoxotungstate Compound (H2dien)2[W5O15(HPO4)2]·H2O

• Published in: Journal of chemical crystallography Vol. 40; no. 5; pp. 443 - 447
• Main Authors: Cao, Xue-Gong, He, Li-Wen, Lin, Bi-Zhou, Xiao, Zi-Jing
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.05.2010
• Subjects: Chemistry; Chemistry and Materials Science; Crystallography and Scattering Methods; Inorganic Chemistry; Organometallic Chemistry; Original Paper; Physical Chemistry; Polyoxotungstate compound; Hydrothermal synthesis; Electrochemical property; Crystal structure
• ISSN: 1074-1542; 1572-8854
• DOI: 10.1007/s10870-009-9675-0

A Strandberg-type polyoxotungstate compound, (H 2 dien) 2 [W 5 O 15 (HPO 4 ) 2 ]·H 2 O (dien = diethylenetriamine), has been hydrothermally synthesized and characterized by single crystal X-ray diffraction, elemental analyses and cyclic valtammetry measurements. The compound crystallizes in triclinic system, space group with unit a  = 9.1974(2) Å, b  = 9.7731(2) Å, c  = 18.4565(5) Å, α  = 82.4540(10)°, β  = 87.4230(10)°, γ  = 63.3620(10) Å, V  = 1469.89(6) Å 3 and Z  = 2. It was revealed that the Strandberg-type polyoxotungstate cluster can be considered as a ring formed by five distorted edge- and corner-sharing WO 6 octahedra, capped on both poles by a phosphate tetrahedron sharing three vertices with the ring tungsten centers. The Strandberg clusters are connected with the organic amines through hydrogen-bonding interactions into a three-dimensional supramolecular network. Graphical Abstract The Strandberg-type polyoxotungstate cluster can be considered as a ring formed by five distorted edge- and corner-sharing WO 6 octahedra, capped on both poles by a phosphate tetrahedron sharing three vertices with the ring tungsten centers.