- 作者: 許東明; 蔡彥香; 鄭枝旺
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei, Taiwan
- 中文摘要: Nickel(II) chelate of 2-picolylamine has been studied spectrophotometrically in aqueous solution at 25℃ and at an ionic strength of 0.3M. the formation of pink color chelate was pH dependent, and the optimum pH range was between 7.0 to 8.5. Its mole ratio of ligand to nickel(II) ion was found to be 3 to 1 stoichiometry and the formation constant, logK, was determined as 13.31±0.10. By using the wave-length 535nm, determination of trace amount of nickel(II) ion with the sensitivity of 5.28γ/cm2 was possible. Enthalpy and entropy changes characterizing the formation of the chelate have been calculated as follows:ΔG°=—18.15Kcal mole¯1, ΔH°=—9.65 Kcal mole¯1, ΔS°=28.5 eu mole¯1.
- 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --