| 초록 |
Aniline and derivatives were polymerized by horseradish peroxidase in organic solvent and buffer mixture. The proportion of ortho-directed unit to para-directed unit could be controlled by the reaction condition such as the pH of the buffer or the type of organic solvent. PANIs synthesized in basic buffer and water-immiscible solvent or highly dielectric organic solvent had the higher portion of ortho-directed unit, in which conditions neutral aniline radicals participated in the chain progress more preferentially than cationic anilinium radicals. Polymers composed of ortho-directed unit and para-directed unit alone were obtained with para-position substituted p-toluidine and ortho-position substituted 2, 6-dimethylaniline. Ortho-form was more thermally processible, electrically conductive and soluble in aqueous solution than para-form. |
