High molecular weight poly(p-xylylene-α-dimethylsulfonium chloride) has been synthesized from p-xylylene bis (dimethylsulfonium chloride).
In order to synthesize the self p-type doped PPV, the counteranion chlorides in sulfonium salt of the polyelectrolyte were substituted to the non-nucleophilic anion, $SbF_6^-$ by stirring with $NaSbF_6$ in water at room temperature. It has been observed that the sulfonium salt precursor polymers containing novel counter anions were not soluble in DMF or $CH_3CN$ when the polymers were irradiated by deep ultraviolet. These novel sulfonium salt precursor polymers were sensitive to deep UV region. The pattern generation using sulfonium salt precursor polymers was achieved in 2 μm level on irradiation for 480 sec.
The irradiated polymers were analyzed with IR, UV spectra, DSC, TGA, and EA. These precursor polymers on irradiation afforded products resulting from both homolytic and heterolytic cleavage of carbon-sulfur bond. The products resulted from the photolysis of the precursor polymers were not conjugated polymer, PPV. However, the IR peaks due to conjugation appeared on heating.
