二種類のテトラポッド型チタン(IV) 三置換Dawson 型ポリ酸塩四量体の合成と性質

概要

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Two types of tetrapod-shaped tetramers composed of trititanium(IV)-substitutedDawson polyoxometalates (POMs) have been synthesized, i.e., [{P2W15Ti3O59(OH)3}4{μ3-Ti(H2O)3}4X]21- (X = Cl, Br, I, NO3) and [{P2W15Ti3O57.5(OH)3}4Cl]25-. The former was composed of one encapsulated X- ion and four Dawson units linked through four bridging μ3-Ti(H2O)3 groups, while the latter was also composed of one encapsulated Cl- ion and fourDawson units without the bridging groups. As for the latter tetramer, a new compoundcontaining ammonium cation encapsulated in the central cavity has also been synthesizedby a reaction with NH4Cl and the separately prepared, tri-peroxotitanium(IV)-substitutedDawson POM monomer. Herein, their syntheses, molecular structures and properties are described.
神奈川大学の論文
2009-10-20