title: Two diphosphonate-functionalized asymmetric polyoxomolybdates with catalytic activity for oxidation of benzyl alcohol to benzaldehyde.
abstract: Two asymmetric polyoxomolybdates Na(6){Mo(2)O(5)[(Mo(2)O(6))NH(3)CH(2)CH(2)CH(2)C(O)(PO(3))(2)](2)}·16H(2)O (1) and (NH(4))(7)Na{MoO(2)[(Mo(2)O(6))NH(3)CH(2)CH(2)CH(2)C(O)(PO(3))(2)]}(4)·H(2)O (2) have been synthesized by the reactions of alendronic acid with molybdate. Structure analysis revealed that the polyoxoanions 1 and 2 can be described as dimeric and tetrameric aggregates of the {MoO(3)[(Mo(2)O(6))NH(3)CH(2)CH(2)CH(2)C(O)(PO(3))(2)]} units respectively. Their tetrabutylammonium salts show efficient selective oxidation of benzyl alcohol to benzaldehyde with 72.5% and 81.5% benzyl alcohol conversion, and 87.1% and 82.4% benzaldehyde selectivity, respectively.
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education Faculty 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: Xiaojia
authors.initials: X
authors.lastname: Feng
authors.forename: Yangguang
authors.initials: Y
authors.lastname: Li
authors.forename: Aixue
authors.initials: A
authors.lastname: Yan
authors.forename: Enbo
authors.initials: E
authors.lastname: Wang
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry*; D019905:Benzyl Alcohol / Q000737:chemistry*; D002384:Catalysis; D004164:Diphosphonates / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry*; D010084:Oxidation-Reduction; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D001547:Benzaldehydes; D004164:Diphosphonates; C044659:molybdate; D008982:Molybdenum; D006861:Hydrogen Peroxide; D019905:Benzyl Alcohol; C032175:benzaldehyde