LANGMUIR AND LANGMUIR-BLODGETT-FILMS OF PARENT POLYANILINE DOPED WITHFUNCTIONALIZED ACIDS

The fabrication of Langmuir and Langmuir-Blodgett (LB) films from high -molecular-weight, doped parent polyaniline is reported. Parent polyan iline was rendered soluble by doping it with functionalized protonic a cids (e.g. camphorsulfonic and toluenesulfonic acids) whose counter-io n induces solubility in low boiling point solvents such as chloroform. Condensed monolayers with high collapse pressures (above 30 mN/m) wer e obtained when an acidic subphase was used. The monolayers could be r eadily transferred onto hydrophilic substrates in the form of Z-type L angmuir-Blodgett films, and most importantly with transfer ratios clos e to 1. Interestingly, the films are readily obtained in the doped for m and are electroactive.