Journal of Polymer Science A, Polymer Chemistry vol:46 issue:14 pages:4817-4829
New functionalized, (a)chiral poly(phenylene-alt-bithiophene)s were prepared and their chiroptical properties were studied. The polymers were prepared by a Stille coupling reaction and were functionalized with protected carboxylic acid and amino functions (tert-butyl ester and BOC respectively). The polymers are present as well conjugated rigid rods in solution, which (chirally) aggregate in nonsolvents and film. In a next step, the protecting group (tert-butyl ester in case of the carboxylic acid) was removed. Aggregation of this polymer can be induced by addition of amines; if chiral amines are used, the polymer chains chirally stack. (C) 2008 Wiley Periodicals, Inc.