title: Tuning the dipolar second-order nonlinear optical properties of cyclometalated platinum(II) complexes with tridentate N^C^N binding ligands.
abstract: Appropriate functionalization of the cyclometalated ligand, L, and the choice of the ancillary ligand, X, allows the dipolar second-order nonlinear optical response of luminescent [PtLX] complexes--in which L is an N^C^N-coordinated 1,3-di(2-pyridyl)benzene ligand and X is a monodentate halide or acetylide ligand--to be controlled. The complementary use of electric-field-induced second-harmonic (EFISH) generation and harmonic light scattering (HLS) measurements demonstrates how the quadratic hyperpolarizability of this appealing family of multifunctional chromophores, characterized by a good transparency throughout much of the visible region, is dominated by an octupolar contribution.
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Milano, UdR dell'INSTM di Milano and ISTM-CNR via Golgi 19, 20133 Milano, Italy.
authors.forename: Ester
authors.initials: E
authors.lastname: Rossi
authors.forename: Alessia
authors.initials: A
authors.lastname: Colombo
authors.forename: Claudia
authors.initials: C
authors.lastname: Dragonetti
authors.forename: Stefania
authors.initials: S
authors.lastname: Righetto
authors.forename: Dominique
authors.initials: D
authors.lastname: Roberto
authors.forename: Renato
authors.initials: R
authors.lastname: Ugo
authors.forename: Adriana
authors.initials: A
authors.lastname: Valore
authors.forename: J A Gareth
authors.initials: JA
authors.lastname: Williams
authors.forename: Maria Grazia
authors.initials: MG
authors.lastname: Lobello
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: Anu
authors.initials: A
authors.lastname: Singh
authors.forename: Joseph
authors.initials: J
authors.lastname: Zyss
keywords: chromophores; density functional calculations; ligand effects; nonlinear optics; platinum