title: Influence of pH and organic ligands on the supramolecular network based on molybdenum phosphate/strontium chemistry.
abstract: Three supramolecular materials based on different poly(oxomolybdophosphate) clusters, (H(2)imi)(6)(Himi)(4)[{Sr(H(2)O)(4)}(2){Sr ⊂ P(6)Mo(4)(V)Mo(14)(VI)O(73)}(2)]·17H(2)O (1), (H(2)(4,4'-bpy))(2)[Cu(2)Sr(2)Mo(12)O(24)·(OH)(6)(H(2)O)(6)(H(2)PO(4))(2)(HPO(4))(2)(PO(4))(4)]·5H(2)O (2), and (H(2)bim)(H(2)bim)[SrP(2)Mo(5)O(23)(H(2)O)(3)]·2H(2)O (3) (imi = imidazole, 4,4'-bpy = 4,4'-bipyridine, and bim = 2,2'-biimidazole), have been hydrothermally synthesized and structurally characterized by the elemental analysis, TG, IR, UV-vis, XPS and the single-crystal X-ray diffraction. Compound 1 is made up of unusual basket-shape [Sr ⊂ P(6)Mo(18)O(73)](10-) cages linked by [Sr(H(2)O)(4)](2+) fragments to yield unprecedented dimeric chains, which represent the first 1-D assemblies of basket-type POMs. Compound 2 exhibits a novel string constructed from sandwich-like [Cu(P(4)Mo(6)O(31))(2)] units and {Sr(2)Cu} trinuclear linkers. Compound 3 is the first chain of Strandberg-type polyoxoanions connected by Sr(2+) cations. All the 1-D chains are further packed into various 3-D supramolecular assemblies via strong hydrogen-bonding interactions. The electrochemical and electrocatalysis behavior of 1, 2, and 3-CPE have been investigated in detail.
authors.affiliation: Key Laboratory of Synthesis of Functional Materials and Green Catalysis, College of Heilongjiang Province, School of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150080, P.R. China.
authors.forename: Kai
authors.initials: K
authors.lastname: Yu
authors.forename: Bai-Bin
authors.initials: BB
authors.lastname: Zhou
authors.forename: Yang
authors.initials: Y
authors.lastname: Yu
authors.forename: Zhan-Hua
authors.initials: ZH
authors.lastname: Su
authors.forename: Hai-yan
authors.initials: HY
authors.lastname: Wang
authors.forename: Chun-mei
authors.initials: CM
authors.lastname: Wang
authors.forename: Chun-xiao
authors.initials: CX
authors.lastname: Wang
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D056831:Coordination Complexes; D003300:Copper; D008024:Ligands; D008982:Molybdenum; D013324:Strontium; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates