摘要
用分光光度法研究了酞菁合铁［Ｆｅ（Ⅲ）Ｐｃ（ＣＯＯＨ）４ＯＨ－］与β羟基乙硫醇（ＨＯＣＨ２ＣＨ２ＳＨ）的轴向配位反应热力学，求得了配位数（ｎ），稳定常数（βｎ）及热力学参数ΔｒＨ０ｍ、ΔｒＳ０ｍ。用停流法研究了［Ｆｅ（Ⅲ）Ｐｃ（ＣＯＯＨ）４ＯＨ－］与β羟基乙硫醇及苯硫酚的轴配反应动力学，讨论了反应机理，求得了预平衡步的平衡常数（Ｋ）和速控步的速率常数（ｋ）；研究了温度等诸因素对反应动力学的影响，得到了预平衡的ΔｒＨ０ｍ、ΔｒＳ０ｍ和速控步的活化参数Δ≠Ｈｍ。
The thermodynamic and kinetic properties were studied for the axial coordination reaction (1) of 2,9,16,23 tetracarboxyphthalocynineiron(Ⅲ) with thiols in potassium hydroxide solution [Fe(Ⅲ)Pc(COO -) 4OH -]+RS -=[Fe(Ⅲ)Pc(COO -) 4(RS -)] 4- +OH -(1) The equilibrium constant ( β n) and coordination number of reaction (1) were measured by spectrophotometry The standard molar enthalpy ( Δ r H 0 m) and standard molar entropy ( Δ r S 0 m) of the reaction (1) were calculated Kinetics of the reaction (1) was studied by means of stopped flow method The reasonable mechenism of the reaction was postulated, and the pre equilibrium constant and rate constant were obtained The standard molar enthalpy and standard molar entropy of the pre equilibrium step and the activation parameters of the rate controling step were calculated
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1998年第4期388-392,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金
天津市自然科学基金
南开大学吸附分离功能高分子材料国家重点实验室资助
关键词
轴向配位反应
氢氧化
四羧基酞菁合铁
硫醇
tetracarboxyphthalocynineiron(Ⅲ) hydroxide thiols thermodynamics and kinetics of axial coordinational reaction stopped flow method spectrophotometer
