Comparison between SiMe<sub>2</sub> and CMe<sub>2</sub> Spacers as σ-Bridges for Photoinduced Charge Transfer
作者:Cornelis A. van Walree、Martin R. Roest、Wouter Schuddeboom、Leonardus W. Jenneskens、Jan W. Verhoeven、John M. Warman、Huub Kooijman、Anthony L. Spek
DOI:10.1021/ja960546e
日期:1996.1.1
The potential of dimethylsilylene and isopropylidene sigma-spacers as bridges for photoinduced charge transfer (CT) in 4-cyano-4'-(dimethylamino)- and 4-cyano-4'-methoxy-substituted diphenyldimethylsilanes and 2,2-diphenylpropanes was studied. Fluorescence solvatochromism and time-resolved microwave conductivity measurements show that upon photoexcitation a charge separated state (D(.+)sigma A(.-))* is populated in all compounds. Excited state dipole moments for a given donor-acceptor combination are, irrespective of the bridge, equal. The CT states of the silanes are however lying at lower energies, implying that the presence of silicon thermodynamically facilitates the CT process. Cyclic voltammetry data of model compounds show that this is a consequence of the lowering of the acceptor reduction potential by the silicon bridge. It was however inferred from radiative decay rates that the electronic coupling between the CT and locally excited states as well as the coupling between the ground and CT state is larger for the carbon-bridged compounds. As shown by both solution and solid state electronic spectra and radiative decay rates, the photophysics of the D sigma A compounds are dominated by intensity borrowing of the CT transitions from transitions localized in the D sigma and sigma A chromophores.
Ink composition, inkjet recording method, printed material, method for producing planographic printing plate, and planographic printing plate
申请人:FUJIFILM Corporation
公开号:EP1988136B1
公开(公告)日:2010-09-01
Ink composition, image forming method and printed article
申请人:Tsujihata Shigetomo
公开号:US20070004823A1
公开(公告)日:2007-01-04
Disclosed are an ink composition comprising at least a colorant (a) and a polymer (b) having a heterocyclic moiety forming a colorant, an image forming method including applying the ink composition to a recording medium by printing and curing the ink composition, and a printed article produced by curing the ink composition.
INK JET INK COMPOSITION, AND IMAGE FORMATION METHOD AND RECORDED MATERIAL EMPLOYING SAME
申请人:SANO Shojiro
公开号:US20080081124A1
公开(公告)日:2008-04-03
An inkjet ink composition is provided that includes a polymerizable compound, a photopolymerization initiator, and a metal powder. There is also provided an image formation method that includes an image recording step of recording an image on a recording material by inkjet recording in which the inkjet ink composition is discharged, and an image curing step of curing the image recorded on the recording material in the image recording step by irradiation with actinic radiation. Furthermore, there is provided a recorded material formed by s using the inkjet ink composition.
INK COMPOSITION, INKJET RECORDING METHOD, PRINTED MATERIAL, METHOD FOR PRODUCING PLANOGRAPHIC PRINTING PLATE, AND PLANOGRAPHIC PRINTING PLATE
申请人:WATANABE Kotaro
公开号:US20080213550A1
公开(公告)日:2008-09-04
There are provided an ink composition including a polymerization initiator, a polymerizable monomer and a phosphoric acid group-containing polymer having a weight-average molecular weight in a range of 10,000 to 30,000; an inkjet recording method using the ink composition; a printed material recorded by the inkjet recording method; a method of producing a planographic printing plate using the ink composition; and a planographic printing plate obtained by the method of producing a planographic printing plate.