title: Phenylene vinylene platinum(II) acetylides with prodigious two-photon absorption.
abstract: The linear and nonlinear optical properties of a series of linear and cross-conjugated platinum(II) acetylide complexes that contain extended p-(phenylene vinylene) chromophores are reported. The complexes exhibit very high femtosecond two-photon absorption (2PA) cross section values (σ(2) up to 10,000 GM), as measured by nonlinear transmission (NLT) and two-photon excited fluorescence (2PEF) methods. The large 2PA cross sections span a broad range of wavelengths, 570-810 nm, and they overlap with the triplet excited state absorption. Spectral coincidence of high cross section 2PA and triplet absorption is a key feature giving rise to efficient dual-mode optical power limiting (OPL).
authors.affiliation: Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, USA. dubinina@chem.ufl.edu
authors.forename: Galyna G
authors.initials: GG
authors.lastname: Dubinina
authors.forename: Randi S
authors.initials: RS
authors.lastname: Price
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
authors.forename: Geoffrey
authors.initials: G
authors.lastname: Wicks
authors.forename: Pawel
authors.initials: P
authors.lastname: Wnuk
authors.forename: Yuriy
authors.initials: Y
authors.lastname: Stepanenko
authors.forename: Mikhail
authors.initials: M
authors.lastname: Drobizhev
authors.forename: Aleksander
authors.initials: A
authors.lastname: Rebane
authors.forename: Kirk S
authors.initials: KS
authors.lastname: Schanze
mesh_terms: D000114:Acetylene / Q000737:chemistry*; D015394:Molecular Structure; D009944:Organoplatinum Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D017785:Photons; D011145:Polyvinyls / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D009944:Organoplatinum Compounds; D011145:Polyvinyls; C530822:oligo(p-phenylene vinylene); D000114:Acetylene