Wakayama University · Faculty of Systems Engineering · 教授

Research keywords無機合成化学・無機構造化学・ペルオキソメタレート・ポリオキソメタレート

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• Synthesis, structure and spectroscopic analyses of aquachloridooxidodiperoxidomolybdate(VI)2014 · A novel aquachloridooxidodiperoxidomolybdate(VI), [MoClO(O-2)(2)(OH2)](-), was crystallised as tetraethylammonium and triethylmethylammonium salts from strongly acidic aqueous solutions, and was structurally analysed by single crystal X-ray diffraction and NMR spectroscopy. The aqueous behaviour of the present anion observed by O-17 NMR agrees with that reported in a previous speciation study.
• Calcium and strontium salts of (glycinato- k2N,O)oxidobis(peroxido-k2O,O’)vanadate(V) tetrahydrate2013 · The title salts calcium (glycinato-κ2 N,O) oxidobis(peroxido-κ2 O,O′)vanadate(V) tetrahydrate, Ca[VO(O2)2(NH2CH2COO)] ·4H2O, and strontium (glycinato-κ2 N,O)oxidobis(peroxido-κ2 O,O′)vanadate(V) tetrahydrate, Sr[VO(O2)2(NH2CH2COO)] ·4H2O, crystallized at pH ca 7.4 with similar lattice parameters. The glycinate anion acts as a bidentate N,O-chelating ligand, and the V atom has a pentagonal bipyramidal geometry, with two η2- peroxo groups and the glycinate N atom in the equatorial plane, and one terminal oxo and a glycinate O atom at the axial positions. The H atoms of three of the four water molecules in the strontium salt exhibited disorder over three positions for each molecule. © 2013 International Union of Crystallography.
• Potassium, rubidium and ammonium salts of -(formato-2O:O)--oxido-bis[oxidobis(peroxido-2O,O)molybdate(VI)]2013 · The unit-cell parameters of the three title salts, namely, tripotassium, K3[Mo2(CHO2)O3(O2)4], trirubidium, Rb3[Mo2(CHO2)O3(O2)4], and triammonium -(formato-2O:O)--oxido-bis[oxidobis(peroxido-2O,O)molybdate(VI)], (NH4)3[Mo2(CHO2)O3(O2)4], which were all crystallized at pH 3, are quite similar, but the potassium and rubidium salt structures are noncentrosymmetric, whereas that of the ammonium salt is centrosymmetric. Formate acts as an O:O-bridging ligand in the complex anion and is bound to a -oxido-bis(oxidodiperoxidomolybdate) unit.
• Dipotassium Diaquadiphosphatooctaperoxotetramolybdate, [K-2(P2O7){MoO(O-2)(2)}(2){MoO(O-2)(2)(OH2)}(2)](2-) - a One-Dimensional Double Chain Array of Polyanions Linked by Potassium Cations2013 · A dipotassium diaquadiphosphatooctaperoxotetramolybdate, [K2(P2O7){MoO(O2)2}2{MoO(O2)2(OH2)}2]2, was crystallised as a tetramethylammonium salt and its structure was determined by single-crystal X-ray diffraction. The diaquadiphosphatooctaperoxotetramolybdate moiety (POPMo4) consists of four molybdenum decahedra and one 4-diphosphate group. All Mo atoms bear two peroxo groups at their equatorial positions. Two of the four Mo atoms are also coordinated by a water molecule. The four molybdenum decahedra are separated and linked by the diphosphate group. The POPMo4 moieties are linked by potassium atoms to form an infinite anionic 1D double chain. The chains are connected by hydrogen bonds to water of crystallisation molecules to form a 2D network. POPMo4 or its precursor gives a 31P NMR signal at = 7.3 ppm in the reaction solution and is stable at low pH and a high Mo/diphosphate molar ratio.

• ヘテロポリ酸擬液相反応場の動的解析と新規触媒反応の設計
• 高機能性ポリオキソメタレート触媒の開発
• ポリオキソメタレート･ペルオキソポリオキソメタレート形成・変換反応の解析
• イオン間相互作用や分子形状認識を利用したポリオキソメタレート・ペルオキソポリオキソメタレートの構築

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