- 作者: S. A. Abou Ali; A. M. Hindawey; G. B. Mohamed
- 作者服務機構: Chemistry Department, Faculty of Science and Education, Alexandria University-Alexandria-Egypt
- 中文摘要: The polarographic behaviour of quinaldic acid in the presence of lanthanide cations (Nd/sup 3+/, Gd/sup 3+/, Er/sup 3+/) is studied at pH=4.5 and 0.1M HClO/sub 4/ as supporting electrolyte. The polarographic reduction gives two waves at lower concentrations of quinaldic acid and three waves at higher concentrations. The nature of the waves was investigated. The dissociation constant of quinaldic acid as well as the stability constants of some lanthanide cation complexes with quinaldic acid were determined potentiometrically in 75% (v/v) dioxane-water at 25.degree.C and 0.1M KNO/sub 3/. The solid complexes of Nd, Gd and Er were isolated and studied by ir, differential thermal analysis (DTA) and thermogravimetric analysis (TGA) techniques.
- 英文摘要: --
- 中文關鍵字: Complexes; lantharides; polargraphy; acid-dissociation and stability constants; synthesis.
- 英文關鍵字: Complexes; lantharides; polargraphy; acid-dissociation and stability constants; synthesis.