【摘要】 在pH =2 5～ 4 0的条件下 ,以四氯化钛、过氧化氢和氨三乙酸为原料反应得到四种过氧酸钛配合物 (NH4) 4 [Ti2 O (O2 ) 2 (ta) 2 ]·4H2 O (1) ,K4[Ti2 O(O2 ) 2 (ta) 2 ]·6H2 O (2 ) ,Sr2 [Ti2 O(O2 ) 2 (ta) 2 ]·10H2 O (3 )和Ba2 [Ti2 O(O2 ) 2 (ta) 2 ]·10H2 O (4 )(H3 ta =C6H6O6N) .配合物的EA ,UV vis,IR和X射线单晶分析表明它们含有相同的双核过氧氨三乙酸钛的阴离子结构 ,钛原子与过氧基团、四齿氨三乙酸和桥氧七配位 .3和 4中的阳离子锶和钡分别与周围的水分子和羧基氧形成九配位和十配位 .配合物 1,3和 4在空气中 60 0℃分解 ,XRD分析表明分别得到金红石型TiO2 ,SrTiO3 和四方BaTiO3 纯相 .更多还原

【Abstract】 Different peroxo titanate（Ⅳ） complexes coordinated with tris（hydroxycarbonylmethyl）amine trivalent anion including ammonium, potassium, strontium and barium salts （NH 4） 4[Ti 2O（O 2） 2（ta） 2]·4H 2O （1）, K 4[Ti 2O^{O 2} 2^ta 2]·6H 2O （2）, Sr 2[Ti 2O（O 2） 2（ta） 2]·10H 2O （3） and Ba 2[Ti 2O（O 2） 2（ta） 2]·10H 2O （4） were obtained directly from the triad system of TiCl 4-H 2O 2-H 3ta [H 3ta=tris（hydroxycarbonylmethyl）amine] in pH 2.5～4.0. These complexes were characterized with elemental analysis, UV-vis and IR spectra. X-ray structural analysis shows that all complexes contain a similar dimeric anion structure, in which titanium atom is coordinated heptagonally by a peroxo group, a tetradenatate tris（hydroxycarbonylmethyl）amine trivalent anion ligand and a bridging oxygen atom. The cation Sr 2+ and Ba 2+ are coordinated enneahedrally and decagonally by water molecules and carboxyl groups of tris^{hydroxycarbonylmethyl}amine trivalent anion ligand respectively. The ammonium, strontium and barium salts can be decomposed stoichiometrically into the expected low-temperature phases of rutile TiO 2, SrTiO 3 and tetragonal BaTiO 3 at the temperature of 600 ℃ respectively, which has been confirmed by XRD characterization.更多还原