title: pH-dependent assembly of two inorganic-organic hybrid compounds based on octamolybdates: an unusual intercalated layer and a 3D 4-connected framework.
abstract: Two novel inorganic-organic hybrid compounds based on octamolybdates, namely, [Cu(H(2)L)(2)(γ-Mo(8)O(26))]·(Mo(6)O(19))·2H(2)O (1) and [Cu(H(2)L)(γ-Mo(8)O(26))(H(2)O)(2)]·5H(2)O (2), where L = 1,1'-(1,5-pentanediyl)bis[2-(4-pyridyl)benzimidazole], have been successfully synthesized at different pH values under hydrothermal conditions. Compound 1, which is hydrothermally prepared at pH ≈ 3.5, exhibits an entirely new type of intercalated layer. The nanosized hexamolybdate anions as guests are introduced into the layers. When the pH value is adjusted to 2, a structurally-different complex 2 was obtained. Compound 2 shows a unique 3D 4-connected framework constructed by inorganic layers and H(2)L(2+) ligands as bridges. The two compounds were characterized by elemental analyses, IR spectra and TGA. In addition, the electrochemical properties of 1-modified carbon paste electrode (CPE) have also been investigated in 1 M H(2)SO(4) aqueous solution.
authors.affiliation: Key Lab of Polyoxometalate Science, Department of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China.
authors.forename: Hai-Yan
authors.initials: HY
authors.lastname: Liu
authors.forename: Jin
authors.initials: J
authors.lastname: Yang
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Liu
authors.forename: Jian-Fang
authors.initials: JF
authors.lastname: Ma
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D055664:Electrochemical Techniques; D004573:Electrolytes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007364:Intercalating Agents / Q000737:chemistry*; D008024:Ligands; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D056831:Coordination Complexes; D003300:Copper; D004573:Electrolytes; D007364:Intercalating Agents; D008024:Ligands; D008982:Molybdenum; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates