CTAB对四磺酸基酞菁钴与Na2S反应的影响

研究了十六烷基三甲基溴化铵（CTAB）对四磺酸基酞菁钴(CoTsPc)与Na₂S反应的影响，发现在CTAB存在下CoTsPc与Na₂S更易发生氧化还原反应生成轴向配合物HSCo(I)TsPc. 讨论了CTAB对该反应的作用机理. 采用多波长、双系数法解析反应平衡混合物的紫外吸收光谱，计算了该反应生成物的组成和反应的平衡常数. 从温度对反应平衡常数影响，得到了该反应的热力学数据. 在CTAB浓度为8.36×10^-3 mol?L^-1及303 K时，反应的ΔGΘ、ΔHΘ和ΔSΘ分别为－17.28 kJ?mol^-1、84.1 kJ?mol^-1 和335 J?mol^-1?K^-1.

Influence of CTAB on the Reaction between Cobalt Tetrasulphonated Phthalocyanine and Sodium Sulfide

The influence of n-hexadecyltrimethylammoniumbromide (CTAB) on the reaction between cobalt tetrasulphonated phthalocyanine (CoTsPc) and sodium sulfide has been investigated. The result shows that in the presence of the micelles, cobalt tetrasulphonated phthalocyanine can be reduced by sodium sulfide at pH 8.5~9.5 to forms the corresponding Co(I) complex. The mechanism of the reaction is also discussed. Using the method of multi-wavelength and double-parameter, UV-Vis spectra of the system are analyzed and the thermodynamics of the reaction is reported. In the CTAB micelle(cCTAB=8.36×10^-3 mol?L^-1) and 303 K, the changes of standard free energy, enthalpy and entropy of the reaction(ΔGΘ, ΔHΘ and ΔSΘ) are －17.28 kJ?mol^-1, 84.1 kJ?mol^-1 and 335 J?mol^-1?K^-1 respectively.