论文部分内容阅读
用分光光度法在２９３±１Ｋ温度下测定了由高价阳离子Ｆｅ~（３＋）和高价阴离子（ＣＴＳ）~（４－）（３，６－二磺酸钠－１，８－二羟基萘酚）形成配阴离子Ｆｅ（ＣＴＳ）~（－）在乙醇－水混合溶剂中的稳定常数随离子强度的变化．用推广的Ｄｅｂｙｅ－Ｈ ｃｋｅｌ方程和Ｐｉｔｚｅｒ方程计算了配位离子的热力学稳定常数，发现Ｄｅ－ｂｙｅ－Ｈ ｃｋｅｌ方程完全不能适用本体系，而基于Ｐｉｔｚｅｒ方程的多项式逼近法则可得到满意的结果。讨论了介质效应和络合反应的标准迁移自由能。
By the spectrophotometry at 293 ± 1K temperature was determined by the high-priced cation Fe ~ (3 +) and high anion (CTS) ~ (4 -) (3,6-disulfonate sodium-1,8- dihydroxynaphthol) The formation of anionic Fe (CTS) ~ (-) in ethanol - water mixed solvent with the ionic strength of the constant change. The thermodynamic stability constants of the coordination ions were calculated using the extended Debye-H ckel equation and the Pitzer equation. It is found that the De-bye-H ckel equation can not fit this system at all, and the polynomial approximation method based on the Pitzer equation can obtain satisfactory results. The standard free energy of mediation and the complexation reaction are discussed.