Self-assembling and light-harvesting properties of fluorescent linear condensed aromatic gelators*
Jean-Pierre Desvergne1, Alexandre G. L. Olive1, Neralagatta M. Sangeetha1, Jens Reichwagen2, Henning Hopf2, and André Del Guerzo1
1LCOO-CNRS UMR 5802, Université Bordeaux 1, F-33405, Talence, France; 2Institut für Organische Chemie, TU-Braunschweig, D-38106 Braunschweig, Germany
Abstract: The self-assembling and photophysical properties of soluble fluorescent linear condensed aromatic gelators are reported. The gels formed by 2,3-alkoxy derivatives are constituted of nanofibers weaving a 3-dimensional supramolecular network and imprisoning the solvent. These nanofibers are efficient light-harvesting systems in which complete energy transfer toward a fluorescent acceptor can be achieved at doping levels below 1 mol % of acceptor.
Keywords: organogelators; energy transfer; fluorescence; tetracene; pentacene.
*Paper based on a presentation at the XXIst Symposium on Photochemistry, 2-7 April 2006, Kyoto, Japan. Other presentations are published in this issue, pp. 2193-2359.