| http://www.w3.org/ns/prov#value | - A polyfluorene compound comprising from about 3 to about 5,000 repeat units of the formula ##STR35## wherein R1 is an aliphatic group including at least one polar heteroatom-containing group and R2 is selected from the group consisting of hydrogen, alkyls and aliphatic groups including at least one polar heteroatom-containing group, the compound being essentially devoid of polynuclear structures a
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