Surfactant Molecules In An Orderly Combination Of Catalytic Properties Of,

1. Catalysis of SDS Admicelles on the Electrochemical Polymerization of AnilineThe electrochemical polymerization of aniline was studied in SDS admicelles. The results exhibit that electrochemical polymerization of aniline can be catalyzed by SDS admicelles. The catalytic efficiency in SDS solutions increases slowly with SDS concentration when SDS concentration is very low, but increases rapidly when SDS admicelles are formed on the electrode surface. The catalytic efficiency decreases with the addition of n-pentanol. The polyaniline films formed in SDS admicelles were nanometer films and the size of particles in the films increases with SDS concentration, but decreases with the addition of n-pentanol. Therefore, n-C5H11OH can be used to regulate and control electrochemical polymerization of aniline in SDS admicelles.2. Catalysis of SDS/n-C5HnOH/H2SO4(aq) Lyotropic Liquid Crystal on Electrochemical Polymerization of AnilinePolymerization of aniline was performed by the method of ultramicroelectrode cyclic voltammetry in the lamellar liquid crystal and hexagonal liquid crystal of SDS/n-C5H11OH/H2SO4(aq) system. The results indicate that the electrochemical polymerization of aniline can be catalyzed by SDS/n-C5H11OH/H2SO4(aq) lyotropic liquid crystal. The polymerization potential of aniline is less about 300~400 mV in the lyotropic liquid crystal system than that in the 0.10 mol-L-1 sulfuric acid solution. The catalytic efficiency and polymerization rate of aniline increase with the increase of n-pentanol content, but decrease with the increase of SDS content or [PhNH2/H2SO4(aq)] content. Moreover, the catalytic efficiency of the lamellar liquid crystal exceeds that ofthe hexagonal liquid crystal in the SDS/n-C5HiiOH/H2SO4(aq) system.3. Catalysis of SDS Admicelles on the Electrochemical Oxidation ofZ,-cysteineThe electrochemical properties of L-cysteine were determined by the methods of ultramicroelectrode cyclic voltammetry and A.C. impendence. The results indicate that the reaction of electrochemical oxidation of L-cysteine is a diffusion-controlled irreversible one and the apparent number of electron transfer is 0.347. The electrochemical oxidation of Z-cysteine can be catalyzed by SDS admicelles. The catalytic efficiency hardly increases with SDS concentration when SDS concentration is less than the critical admicelle concentration (cac). The catalytic efficiency increases rapidly with SDS concentration when SDS concentration is between cac and the critical micelle concentration (cmc). The catalytic efficiency decreases with SDS concentration when SDS concentration is larger than cmc. The rate constant k?first increases, then decrease with the SDS concentration. However, the Gibbs free energy AG* is the reverse of these results.4. Catalysis of SDS/BA/H2O O/W Microemulsion on theElectrochemical Oxidation of Z,-cysteineThe catalysis of SDS/BA/H2O O/W microemulsion on the electrochemical oxidation of 1,-cysteine was studied by the method of ultramicroelectrode cyclic voltammetry. The results indicate that the catalytic efficiency increases with BA or SDS content, but decreases with the increase of water content in the microemulsion system. The rate constant k0 increases with BA or SDS content, but decrease with the increase of water content. The Gibbs free energy AG decreases with BA or SDS content, but increases with the increase of water content.5. Catalysis of SDS/BA/H2O Lyotropic Liquid Crystal on theElectrochemical Oxidation of L-cysteineThe catalysis of SDS/BA/H2O lyotropic liquid crystal system on the electrochemical oxidation of L-cysteine was studied by the method of ultramicroelectrode cyclic voltammetry. The impact factors of catalysis on the electrochemical oxidation depend on the structures, pentration and composition of lyotropic liquid crystals. The results indicate that the catalytic efficiency and rate constant k?increase with BA content at a constant weight ratio of SDS/H2O, but decreases with SDS or water content at a constant wei...