Zn-Cresol

Polyaniline is less tolerant of preparation conditions than polypyrrole, and the list of anion dopants used in the preparation is more limited. However, subsequent replacement of the anion used in preparation by a dodecylben-zene sulfonate makes polyaniline become soluble in solvents such as Af-methyl pyrrolidone (NMP), or zn-cresol, and it can be spin-coated or otherwise solution-processed. In a similar way derivatives of aniline, such as... 

Polyaniline can be rendered processible by the use of specific counterions (dopants). In this technique, the emeraldine base is mixed with appropriate dopant and the resulting mixture is dissolved in the appropriate solvent [37]. The solubility of emeraldine base in aqueous acetic acid as discussed above can be viewed as counterion-induced processibility. However, it was not until the recent discovery [7,8,37] that polyanilines doped with d,l-camphorsulfonic acid and dodecylbenzenesulfonic acid are soluble in common organic solvents such as m-cresol and toluene that counterion-induced processibility sparked interest in the scientific community. The d,l-camphorsulfonic acid/zn-cresol system, in particular, has generated considerable interest due to coupled effects of high transparency and conductivity (100-400 S/ cm). 

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