title: Solvent-driven association and dissociation of the hydrogen-bonded protonated decavanadates.
abstract: Hydrogen-bond-assisted molecular aggregation of decavanadate anions, [H(n)V(10)O(28)]((6-n)-), in non-aqueous solutions was probed by systematic small-angle X-ray scattering and (1)H and (51)V NMR spectroscopic measurements in mixtures of acetone and 1,4-dioxane. Under acetone-rich conditions, the decavanadate anion prefers a self-associated hydrogen-bonded dimer of {[H(3)V(10)O(28)](2)}(6-), which dissociates into monomeric species as the proportion of 1,4-dioxane increases. The association/dissociation behaviors of the decavanadate anions were proven to be reversible and driven by the protophobic/protophilic nature of the solvent.
authors.affiliation: Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1-H-63 O-okayama, Tokyo 152-8551, Japan.
authors.forename: Tatsuhiro
authors.initials: T
authors.lastname: Kojima
authors.forename: Mark R
authors.initials: MR
authors.lastname: Antonio
authors.forename: Tomoji
authors.initials: T
authors.lastname: Ozeki