1 Synthèse et Electrosynthèse Organiques (CNRS, UMR 6510), Université de Rennes 1, Campus Scientifique de Beaulieu, Bât. 10A, F-35042, Rennes Cedex, France.
Nanoscopic fluorescent dendrimers having up to 96 two-photon chromophores and showing very large two-photon absorption cross-sections (up to 56 000 GM) were designed as a complementary "organic" alternative to quantum dots.