| abstract |
A polymeric material comprising alternate substituted fluorene and phenylene units, as represented by the following formula n n n wherein R 1 , R 2 , R 3 and R 4 , which may be identical or different, are each selected from the group consisting of H, a (C 1 -C 22 ) linear or branched alkyl, alkoxy or oligo (oxyetylene) group, a (C 6 - C 30 ) cycloalkyl group, and an unsubstituted or substituted aryl group, and n is from about 3 to about 5000. |