Syntheses and solid-state polymerization of diacetylene derivatives bearing dodecylthio groups directly bound tosp-carbons

Diacetylenes were synthesized bearing dodecylthio groups directly bound to the sp-carbons. These compounds afford polydiacetylenes having sulfur atoms directly attached to the π-conjugated main chains. The exciton absorption peaks appear at ca. 750 nm, which is a longer wave length than of conventional polydiacetylenes.