Doping of polyaniline via pseudoprotonation by an ionic salt


  • We wish to thank the National Science Council of ROC for financial aid through the project NSC 83-0416-E007-01.


Polyaniline can be converted into a conducting form by either protonation of the imine site or oxidative doping at the amine site. Here, a new class of dopant is reported, ionic salts. An ionic-salt-doped polyaniline is obtained by mixing the emeraldine base of polyaniline and solutions of, for example, LiClO4, LiBF4, or Zn(ClO4)2 in 1-methyl-2-pyrrolidone, and then casting the solution to form films. Materials synthesis, film production, and the demonstration that the material is intrinsically, rather then ionically, conducting are discussed.