title: Proton-triggered octopolar NLO chromophores.
abstract: C(3)-symmetric, octopolar 1,3,5-alkynylbenzenes with terminal pyridyl substituents are presented which show an increase up to 17-fold in the second-order NLO activity upon protonation while maintaining their octopolar character, as confirmed by the depolarization ratios measured.
authors: Department of Chemistry, University of Leuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium.
authors: Inge
authors: I
authors: Asselberghs
authors: Gunther
authors: G
authors: Hennrich
authors: Koen
authors: K
authors: Clays