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New chiral pi-conjugated polymers based on a (1R,2R)-diiminocyclohexane chiral unit with weak interchain pi stacking
Jean-Pierre Lère-Porte1, Joël J E Moreau, Françoise Serein-Spirau
1UMR CNRS 5076 Hétérochimie moléculaire et macromoléculaire, E.N.S.C.M, 8 rue de l'Ecole Normale, 34096 Montpellier, France. lere@cit.enscm.fr
Chemical Communications (Cambridge, England)
|January 23, 2003
Abstract:
New chiral pi-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 ([alpha] up to -3000 degrees) and strong Cotton effects ([theta] 10(6) deg cm2 mol-1).