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

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