title: Effect of branching on two-photon absorption in triphenylbenzene derivatives.
abstract: The photophysical and linear and nonlinear spectral properties of octupolar compounds with a triphenylbenzene core are investigated and compared with properties of corresponding dipolar branches. A correlation is found between the solvatochromic behavior and the two-photon absorption cross section. Moreover, the nature of the core is found to be responsible for the nature of the coupling between branches; in the studied case only (weak) electrostatic interactions are effective, while other cores, like the triphenylamine moiety, are able to promote coherent coupling between the branches, leading to strongly nonadditive properties.
authors.affiliation: Synthèse et ElectroSynthèse Organiques (CNRS, UMR 6510), Université de Rennes 1, Institut de Chimie, Campus Scientifique de Beaulieu, Bât 10A, 35042 Rennes Cedex, France.
authors.forename: Francesca
authors.initials: F
authors.lastname: Terenziani
authors.forename: Céline
authors.initials: C
authors.lastname: Le Droumaguet
authors.forename: Claudine
authors.initials: C
authors.lastname: Katan
authors.forename: Olivier
authors.initials: O
authors.lastname: Mongin
authors.forename: Mireille
authors.initials: M
authors.lastname: Blanchard-Desce