title: Synthesis of novel rod-shaped and star-shaped fluorescent phosphane oxides--nonlinear optical properties and photophysical properties.
abstract: The design of a new class of fluorophores is presented. Some push-pull chromophores (D-pi-A) containing polyphenylethynyl units and a phosphane oxide moiety were efficiently prepared from common intermediates. Straightforward syntheses gave novel one-armed, rod-shaped and three-armed, star-shaped fluorophores. The optical properties of the resulting star-shaped derivatives were evaluated, showed high fluorescence quantum yields, and their excitation induces very efficient charge redistribution. Moreover, thanks to their push-pull character, the molecules exhibited significant second-order NLO properties with good transparency, up to 67x10(-30) esu at 1907 nm, with an absorption lambdamax at 369 nm. The effect of the donor group and of the number of phenylethynyl arms have been studied in this work.
authors.affiliation: CNRS UMR 8531 Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires, Département de Chimie, ENS-Cachan, 61 avenue du Président Wilson, 94235 Cachan Cedex, France.
authors.forename: Minh-Huong
authors.initials: MH
authors.lastname: Ha-Thi
authors.forename: Vincent
authors.initials: V
authors.lastname: Souchon
authors.forename: Abdelwaheb
authors.initials: A
authors.lastname: Hamdi
authors.forename: Rémi
authors.initials: R
authors.lastname: Métivier
authors.forename: Valérie
authors.initials: V
authors.lastname: Alain
authors.forename: Keitaro
authors.initials: K
authors.lastname: Nakatani
authors.forename: Pascal G
authors.initials: PG
authors.lastname: Lacroix
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Genêt
authors.forename: Véronique
authors.initials: V
authors.lastname: Michelet
authors.forename: Isabelle
authors.initials: I
authors.lastname: Leray