Low conversion temperatures of poly(p-phenylene vinylene) films using a long chain sulfonic counter-ion.

Langmuir-Blodgett (LB), Self-assembly (SA) and spin-coating films of a poly (p-phenylenevinylene) (PPV) precursor were prepared using the poly(xylylide netetrahydrothiophenium chloride) (PTHT) precursor, where the counterion ch loride was replaced by a long chain dodecylbenzenesulfonate (DBS) ion. The advantage of introducing DBS lies in the possibility of converting PPV film s with a high conjugation length at 115 degreesC within only 3 min with enh anced optical properties. It is shown that LB and SA films with high therma l stability can be converted at even lower temperature (80 degreesC) than t hat for spin-coated films under atmospheric pressure conditions. In additio n, the photoluminescence properties show the high quality and a well-resolv ed vibronic structure of the films.