title: New [(D-terpyridine)-Ru-(D or A-terpyridine)][4-EtPhCO2]2 complexes (D = electron donor group; A = electron acceptor group) as active second-order non linear optical chromophores.
abstract: The dipolar and octupolar contributions of the second order nonlinear optical properties of [(4'-(C(6)H(4)-p-D)-2,2':6',2''-terpyridine)-Ru-(4'-(C(6)H(4)-p-A)-2,2':6',2''-terpyridine)]Y(2) heteroleptic complexes (D and A are donor and acceptor groups, respectively), and related free terpyridines and homoleptic complexes, have been obtained by means of a comprehensive combination of Electric Field Induced Second Harmonic generation, Third Harmonic Generation, and Harmonic Light Scattering measurements. These results evidence how a metal can act as a bridge between two π-delocalized terpyridine moieties bearing a D and an A group, respectively, leading to a large quadratic hyperpolarizability hugely dominated by the octupolar contribution.
authors.affiliation: Dipartimento di Chimica Inorganica, Metallorganica e Analitica Lamberto Malatesta dell'Università degli Studi di Milano, UdR di Milano dell'INSTM, I-20133 Milano, Italy.
authors.forename: Alessia
authors.initials: A
authors.lastname: Colombo
authors.forename: Danika
authors.initials: D
authors.lastname: Locatelli
authors.forename: Dominique
authors.initials: D
authors.lastname: Roberto
authors.forename: Francesca
authors.initials: F
authors.lastname: Tessore
authors.forename: Renato
authors.initials: R
authors.lastname: Ugo
authors.forename: Marco
authors.initials: M
authors.lastname: Cavazzini
authors.forename: Silvio
authors.initials: S
authors.lastname: Quici
authors.forename: Filippo
authors.initials: F
authors.lastname: De Angelis
authors.forename: Simona
authors.initials: S
authors.lastname: Fantacci
authors.forename: Isabelle
authors.initials: I
authors.lastname: Ledoux-Rak
authors.forename: Nicolas
authors.initials: N
authors.lastname: Tancrez
authors.forename: Joseph
authors.initials: J
authors.lastname: Zyss