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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Interfacial Solubilization of (5,10,15,20-Tetraphenylporphyrinato)-zinc (II) in Cetyltrimethylammonium Chloride Reversed Micellar Solutions
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Interfacial Solubilization of (5,10,15,20-Tetraphenylporphyrinato)-zinc (II) in Cetyltrimethylammonium Chloride Reversed Micellar Solutions

机译：十六烷基三甲基氯化铵倒胶束溶液中的（5,10,15,20-四苯基卟啉-）-锌（II）界面增溶

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摘要

The interaction between the zinc (II) complex of 5,10,15,20-tetraphenylporphyrin (Zn(tpp)) and cetyltrimethylammonium chloride (CTAC) at the interface of a CTAC reverse simcelle in chloroform and 6:5 (v/v) chloroform-cyclohexane has been investigated spectrophotometrically. The spectra of Zn(tpp) in the CTAC reversed micellar solutions provide evidence of formation of the associated species Zn(tpp)CTAC; its Soret band is not influenced by solvent polarity. At a fixed molar ratio of water to surfactant (R_w = [H_2O]/[CTAC]), the absorbance at the maximum of the Zn(tpp)CTAC band increases with an increase in the CTAC concentration. In the slope of the plot a discontinuity was found, due to formation or reverse micelles at this CTAC concentration, taken as the critical micelle concentration (cmc). The variations of the spectral data were interpreted quantitatively by applying the pseudophase model. Increasing R_w causes a decrease in the Zn(tpp)-solubilizing ability of reverse micelles, implying that the nucleophilicity of Cl~- iohn to the central zinc of the complex is dropped by the Cl~- hydration at the interface. Furthermore, the standard free energy of micellization, calculated from the cmc data, indicates that the micellization is promoted by the Cl~- hydration and by decreasing the chloroform fraction in the bulk organic phase.
机译：5,10,15,20-四苯基卟啉锌（II）络合物与十六烷基三甲基氯化铵（CTAC）在氯仿和6：5（v / v）界面上的相互作用已用分光光度法研究了氯仿-环己烷。 CTAC反向胶束溶液中Zn（tpp）的光谱提供了相关物种Zn（tpp）CTAC形成的证据。它的Soret带不受溶剂极性的影响。在水与表面活性剂的摩尔比固定的情况下（R_w = [H_2O] / [CTAC]），Zn（tpp）CTAC谱带的最大值处的吸光度随CTAC浓度的增加而增加。在该图的斜率中，发现由于在该CTAC浓度下形成胶束或反胶束而导致的不连续性，将其作为临界胶束浓度（cmc）。通过应用伪相位模型定量解释了光谱数据的变化。 R_w的增加会导致反胶束的Zn（tpp）增溶能力降低，这意味着Cl_iohn对配合物中心锌的亲核性会由于界面处的Cl〜-水合而下降。此外，由cmc数据计算得出的胶束化标准自由能表明，胶束化是通过Cl-水合作用和通过降低整体有机相中的氯仿组分来促进的。

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