title: Acido- and phototriggered NLO properties enhancement.
abstract: In this paper, acido- and phototriggered enhancement of the nonlinear optical (NLO) properties are achieved by combining the 10-(2-arylethenyl)indolino[2,1-b]oxazolidine unit with various styrylic residues. The synthetic pathway allows the preparation of phenyl, naphthyl, anthryl, and phenanthryl derivatives, which have been shown to display photochromic and acidochromic behavior at ambient temperature. The multiaddressable molecular switches are characterized by a large contrast of the NLO response along the reversible transformations. Hyper-Rayleigh scattering (HRS) experiments clearly indicate the strong influence of the electrodonating substituent borne by the aromatic system. Theoretical calculations have been performed for representative molecules showing a good agreement with the experimental hyperpolarizabilities. This enables a better understanding of the NLO responses in terms of structural and electronic parameters for both closed and protonated open forms.
authors.affiliation: Chimie Supramoléculaire, Biomimétisme et Nanoscience, UMR 5802 CNRS, Université Bordeaux I, Cours de la Libération 351, F-33405 Talence CEDEX, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Sanguinet
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Pozzo
authors.forename: Vincent
authors.initials: V
authors.lastname: Rodriguez
authors.forename: Frédéric
authors.initials: F
authors.lastname: Adamietz
authors.forename: Frédéric
authors.initials: F
authors.lastname: Castet
authors.forename: Laurent
authors.initials: L
authors.lastname: Ducasse
authors.forename: Benoît
authors.initials: B
authors.lastname: Champagne