Two-photon excitation and optical limiting in polyfluorene derivatives (pages 148–153)
Daniel S. Correa, Leonardo De Boni, Bruno Nowacki, Isabel Grova, Bruno D. Fontes, Paula C. Rodrigues, José R. Tozoni, Leni Akcelrud and Cleber R. Mendonça
Article first published online: 31 OCT 2011 | DOI: 10.1002/polb.22390
Because of the high degree of conjugation along their backbone, large two-photon absorption cross sections as high as 3000 Göppert Mayer (1 GM = 1 × 10−50 cm4 s/photon) were measured for a new class of polyfluorene derivatives. Optical limiting and two-photon excited fluorescence also presented by the polymers, coupled with their film-forming ability, chemical stability, and electroluminescence, make them potential candidates for optical and photonics devices.