| http://www.w3.org/ns/prov#value | - A polyfluorene compound comprising from 3 to about 10,000 repeat units of the formula ##STR2## wherein R1 is an aliphatic group including at least one polar heteroatom-containing group selected from the group consisting of cyano-substituted alkyls containing 1 or 2 cyanos on a 4 to 10 carbon atom linear or branched alkyl and polyethers containing 2 to 5 ether oxygens separated from one another by
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