The Chiroptical Properties of a Thermally Annealed Film of Chiral Substituted Polyfluorene Depend on Film Thickness


  • We thank the European Commission for financial support (Contract No. HPRN-CT-2000-0003 (CODE)). The research has also been made possible by a fellowship of the Royal Dutch Academy of Arts and Sciences.


The degree of circular polarization in the absorption of light by a thermally annealed film of chirally substituted polyfluorene depends strongly on the film thickness. This indicates that the exceptionally high dissymmetry ratios observed for these films originate on a nanoscopic level and are related to the long-range correlation in the polymer chain orientation. Circular polarizations (see Figure) of up to 50 % can be reached.