Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
Journal of Coordination Chemistry
Year: 2010  |  Volume: 63  |  Issue: 2  |  Page No.: 196 - 205

Two organic-inorganic hybrids based on polyoxometalates: synthesis, crystal structure, and characterization

Feng Yao, Fan-Xia Meng, Ya-Guang Chen and Chun-Jing Zhang    

Abstract: Two new Keggin- and Wells-Dawson-type polyoxometalate-based organic-inorganic hybrid copper-organonitrogen complexes have been synthesized under hydrothermal conditions: [CuI(4,4'-bpy)]2[H2SiW12O40] ⋅ 2H2O (4,4'-bpy = 4,4'-bipyridine) (1) and {[Cu1(4,4´-bpy]3 [Cu11(en)2]2[As2 Wv3W15 O62]}2 [Cu13(4,4´-bpy)3(H2O)2](HO).4H2O(2)(en =ethylenediamine), and characterized by elemental analysis, IR spectra, TGA, XRD, and single crystal X-ray diffraction. In 1, [Cu(4,4'-bpy)]+ cations form polymeric chains [Cu(4,4´-bpy)]n+n  and a weak Cu-O linkage makes the anions situate between two chains, forming an infinite 1-D ladder-chain structure. Such 1-D ladder-chains are further interconnected via hydrogen bonding into a 3-D supramolecular framework. Compound 2 with covalently bonded 3-D structure consists of saturated Wells-Dawson tungstoarsenate polyoxoanions and copper complexes with two types (rigid and flexible) of ligands. The polyoxoanion has the highest connectivity for Wells-Dawson tungstoarsenate polyoxoanion coordination polymers to date. XPS spectra indicate that three W atoms in the Dawson unit were reduced and that there coexist CuI and CuII in 2.

View Fulltext    |   Related Articles   |   Back
  Related Articles

No Article Found
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility