Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (24): 2379-2385. Previous Articles     Next Articles


周朝晖, 洪麒明, 邓远富   

  1. 厦门大学化学系, 固体表面物理化学国家重点实验室, 厦门, 361005
  • 收稿日期:2004-04-15 修回日期:2004-06-28 出版日期:2004-12-28 发布日期:2014-02-17
  • 通讯作者: 周朝晖,
  • 基金资助:

Pure Ti-based Mixed Oxides Prepared from the Thermal Decompositions of Molecular Precursors of Peroxo Complexes Coordinated with Tris(hydroxycarbonylmethyl)amine Trivalent Anion Titanate(Ⅳ)

ZHOU Zhao-Hui, HONG Qi-Ming, DENG Yuan-Fu   

  1. Department of Chemistry, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005
  • Received:2004-04-15 Revised:2004-06-28 Online:2004-12-28 Published:2014-02-17

Different peroxo titanate(Ⅳ) complexes coordinated with tris(hydroxycarbonylmethyl)amine trivalent anion including ammonium, potassium, strontium and barium salts (NH4)4[Ti2O(O2)2(ta)2]·4H2O (1), K4[Ti2O(O2)2(ta)2]·6H2O (2), Sr2[Ti2O(O2)2(ta)2]·10H2O (3) and Ba2[Ti2O(O2)2(ta)2]·10H2O (4) were obtained directly from the triad system of TiCl4-H2O2-H3ta [H3ta=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 Sr2+ and Ba2+ 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 TiO2, SrTiO3 and tetragonal BaTiO3 at the temperature of 600℃ respectively, which has been confirmed by XRD characterization.

Key words: titanate, precursor, thermal decomposition, peroxo tris(hydroxycarbonylmethyl)amine