Enhancement of Two-Photon Absorption Cross-Section and Singlet-Oxygen Generation in Porphyrins upon β-Functionalization with Donor−Acceptor Substituents
作者:Marika Morone、Luca Beverina、Alessandro Abbotto、Fabio Silvestri、Elisabetta Collini、Camilla Ferrante、Renato Bozio、Giorgio A. Pagani
DOI:10.1021/ol060742i
日期:2006.6.1
The microwave-enhanced synthesis, comparative singlet oxygen sensitization efficiency, and nonlinear optical characterization of a new beta-functionalized porphyrin and its copper complex are described. We show that the introduction of a donor-acceptor push-pull conjugated fragment in the beta position strongly perturbs the porphyrin electronic structure leading to a remarkable one- and two-photon
Vapor Phase Self-Assembly of Molecular Gate Dielectrics for Thin Film Transistors
作者:Sara A. DiBenedetto、David Frattarelli、Mark A. Ratner、Antonio Facchetti、Tobin J. Marks
DOI:10.1021/ja801309g
日期:2008.6.18
Organic-inorganic films grown entirely via a vapor-phase deposition process and composed of highly polarizable molecular structures are investigated as gate dielectrics in organic field-effect transistors(OFETs). Molecules 1 and 2 form self-ordered thin films via hydrogen bonding, and these organic-inorganic structures exhibit large capacitances and large pentacene OFET mobilities.
Novel heteroaromatic-based multi-branched dyes with enhanced two-photon absorption activityElectronic supplementary information (ESI) available: Experimental section. See http://www.rsc.org/suppdata/cc/b3/b305995b/
作者:Alessandro Abbotto、Luca Beverina、Renato Bozio、Antonio Facchetti、Camilla Ferrante、Giorgio A. Pagani、Danilo Pedron、Raffaella Signorini
DOI:10.1039/b305995b
日期:——
The first examples of heterocycle-based multi-branched dyes with efficient two-photon absorption (TPA) activity are reported; the novel chromophores exhibit large TPA cross sections (as high as 1600 × 10−50 cm4 s photon−1 molecule−1, measured with 150 fs laser pulses at 800 nm); a strong cooperative enhancement in the branched systems with respect to the one-dimensional sub-units is found.
Strategies for Electrooptic Film Fabrication. Influence of Pyrrole−Pyridine-Based Dibranched Chromophore Architecture on Covalent Self-Assembly, Thin-Film Microstructure, and Nonlinear Optical Response
作者:Antonio Facchetti、Luca Beverina、Milko E. van der Boom、Pulak Dutta、Guennadi Evmenenko、Atindra D. Shukla、Charlotte E. Stern、Giorgio A. Pagani、Tobin J. Marks