title: Self-assembly of a tetrahedral 58-nuclear barium vanadium oxide cluster.
abstract: We report the synthesis and characterization of a molecular barium vanadium oxide cluster featuring high nuclearity and high symmetry. The tetrameric, 2.3 nm cluster H(5)[Ba(10)(NMP)(14)(H(2)O)(8)[V(12)O(33)](4)Br] is based on a bromide-centred, octahedral barium scaffold which is capped by four previously unknown [V(12)O(33)](6-) clusters in a tetrahedral fashion. The compound represents the largest polyoxovanadate-based heterometallic cluster known to date. The cluster is formed in organic solution and it is suggested that the bulky N-methyl-2-pyrrolidone (NMP) solvent ligands allow the isolation of this giant molecule and prevent further condensation to a solid-state metal oxide. The cluster is fully characterized using single-crystal XRD, elemental analysis, ESI mass spectrometry and other spectroscopic techniques.
authors.affiliation: Department of Chemistry and Pharmacy, Inorganic Chemistry II, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstr. 1, 91058 Erlangen, Germany.
authors.forename: Katharina
authors.initials: K
authors.lastname: Kastner
authors.forename: Bianka
authors.initials: B
authors.lastname: Puscher
authors.forename: Carsten
authors.initials: C
authors.lastname: Streb
mesh_terms: D001464:Barium / Q000737:chemistry*; D001965:Bromides / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008968:Molecular Conformation; D010087:Oxides / Q000737:chemistry*; D011760:Pyrrolidinones / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D017973:Tungsten Compounds / Q000737:chemistry; D014639:Vanadium / Q000737:chemistry; D000099294:Polyoxometalates
chemical_list: D001464:Barium; D001965:Bromides; D008024:Ligands; D010087:Oxides; D011760:Pyrrolidinones; D012996:Solutions; D017973:Tungsten Compounds; D014639:Vanadium; C102296:polyoxometalate I; D000099294:Polyoxometalates; C038678:N-methylpyrrolidone