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Synthesis and Characterization of Repeating Sequence Copolymers of Fluorene and Methylene Monomers

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journal contribution
posted on 08.01.2008, 00:00 by James E. Copenhafer, Robert W. Walters, Tara Y. Meyer
A series of well-defined multiblock (mb) copolymers consisting of alternating 9,9-dihexylfluorene and methylene segments has been prepared. Poly(9,9-dihexylfluorene-mb-methylene)s (PFMs) with repeat units of FxMy (x = 1−4, y = 10, 18 and x = 5−8, y = 18) were assembled by tandem metal-catalyzed acyclic diene metathesis (ADMET) polymerization/hydrogenation from α,ω-olefin bearing precursors. The polymers exhibited weight-average molecular weights ranging from Mw = 10 to 57 kDa. The PFMs exhibit photophysical properties, absorbance, and emission consistent with the length of the fluorene sequence. Glass and melting transition temperatures also increase with fluorene segment length.