New chiral π-conjugated polymers based on a (1R,2R)-diiminocyclohexane chiral unit with weak interchain π stacking

Abstract

New chiral π-conjugated polymers consisting of alternating conjugated segments and (1R,2R)-diiminocyclohexane units with C2 symmetry were prepared by a palladium-catalyzed coupling reaction, they exhibited very high specific optical rotations ([α] up to −3000°) and strong Cotton effects ([θ] 10⁶ deg cm² mol⁻¹).