title: Two new cantilever-type polyoxometalates constructed from {Mo(2)O(4)}(2+) fragments and diphosphonates.
abstract: Two new cantilever-type polyoxometalates Na(5)(NH(4)){V(IV)[(Mo(2)O(6))CH(3)C(O)(PO(3))(2)](2)}.13H(2)O (1) and (NH(4))(4){V(IV)[(Mo(2)O(6))NH(3)CH(2)CH(2)CH(2)C(O)(PO(3))(2)](2)}.6H(2)O (2) have been synthesized and characterized by IR spectroscopy, UV-visible spectroscopy, elemental analysis, TG analysis, XPS, (31)P NMR and single-crystal X-ray diffraction. The structure analysis reveals that the diphosphonate, hydroxyethylidene diphosphonic acid and alendronic acid as the scaffolds, have been grafted on the "S"-shaped polyoxoanions and respectively. The alkyl groups of the diphosphonates like arms hanged on the polyoxoanions form the cantilever-type polyoxometalates.
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, PR China.
authors.forename: Huaqiao
authors.initials: H
authors.lastname: Tan
authors.forename: Weilin
authors.initials: W
authors.lastname: Chen
authors.forename: Ding
authors.initials: D
authors.lastname: Liu
authors.forename: Yangguang
authors.initials: Y
authors.lastname: Li
authors.forename: Enbo
authors.initials: E
authors.lastname: Wang
mesh_terms: D018360:Crystallography, X-Ray; D004164:Diphosphonates / Q000138:chemical synthesis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D004164:Diphosphonates; D009942:Organometallic Compounds; D008982:Molybdenum