Reactions in detergentless microemulsions: Incorporation of copper(II) into meso-tetraphenylporphine ((TPP)H2) in a water/oil microemulsion

Article abstract of DOI:10.1021/ic00136a040

The rate of incorporation of Cu(II) into tetraphenylporphine has been followed in ternary solvent systems consisting of water, toluene, and 2-propanol. Studies carried out in microemulsions at pH 3 show that when the surfactants hexadecyltrimethylammonium perchlorate and hexadecylpyridinium perchlorate are added, little or no change in rate from that observed in detergent-free systems occurs. When the surfactant anion is Cl^- or Br^-, there is a marked increase in rate (ClO₄^- ? Cl^- < Br^-). Addition of the anionic surfactant sodium hexadecyl sulfate and the nonionic Alfonic 1412-60 has little effect on the rate of reaction. A study of the rate of metalation as a function of solvent composition shows an increase in rate in the small-aggregate and normal ternary solution regions.