Preparation,Characterization and Electrochemical Behavior of Reversible Surfactant:(11-Ferrocenylundecyl) Trimethylammonium Bromide
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0621.3;0647.2;0656.9

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    Abstract:

    A novel redox-active cationic surfactant (11-Ferrocenylundecyl) trimethylammonium Bromide (hereinafter referred to FTMA) was synthesized by the main method of Friedel-Crafts reaction and Amination reaction. The synthesized target compounds were characterized by 1H NMR and 13C NMR, the purity of FTMA was 97%.Surface tensions of FTMA and FTMA+ were measured at 30℃ condition used the platinum plate method. The critical micellar concentration (CMC) values were changed from 0.6mmol/L to 1mmol/L when FTMA was oxidized to FTMA+, resulting the surface activity occurred significant changes, the surface tension value was also increased from 38.5mN•m-1 to 55.3 mN•m-1 at the concentration of the CMC. The electrochemical behavior of FTMA in 0.2 mol/L Li2SO4 solution was investigated by cyclic voltammetry methods. Results indicate that the oxidation potential and reduction potential were 0.457V and 0.4168V respectively, the ΔEp is 40.2mV, and the ratio of Ipa/Ipc is 1.26.So FTMA possessed well reversible characteristic, which realized reversibility between reduction and oxidation freely. Otherwise, we finished the changes between FTMA and FTMA+ by electrochemical method. So the surface activity of FTMA can reversible controlled through electrochemical switchable method, and it may be a new kind of surfactant which can be used to the reversible surfactant-enhanced remediation .

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History
  • Received:April 19,2011
  • Revised:May 22,2011
  • Adopted:May 31,2011
  • Online: July 12,2011
  • Published:
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