LIQUID CRYSTAL ALIGNING AGENT AND LIQUID CRYSTAL DISPLAY DEVICE EMPLOYING IT
申请人:Tsutsui Kimiaki
公开号:US20090220707A1
公开(公告)日:2009-09-03
To provide a liquid crystal aligning agent useful to obtain a liquid crystal alignment film excellent in liquid crystal alignment properties, alignment controlling power and rubbing resistance, having high voltage retention characteristics and having reduced charge accumulation, and a liquid crystal display device which is less susceptible to display failure, to lowering of contrast or to image persistence.
A liquid crystal aligning agent comprising a low resistance polyimide precursor having a volume resistivity of from 1×10
10
to
1×10
14
Ωcm when formed into a film, and a high alignment polyimide precursor or polyimide having a specific structure, and a liquid crystal display device employing this liquid crystal aligning agent.
Aromatic Ether-Containing Fluorene Monomers, Processes for their Preparation and Polymerization Thereof
申请人:Veinot Jonathan Gordon Conn
公开号:US20100240856A1
公开(公告)日:2010-09-23
Novel aromatic ether-containing monomers are described along with processes for their preparation and their polymerization into corresponding aromatic ether-containing polyfluorenes. These polyfluorenes exhibited stable blue-emission and therefore have application in polymer light-emitting devices.
[EN] OPTOELECTRONIC POLYMER COMPOSITIONS, AND DEVICES THEREFROM<br/>[FR] COMPOSITIONS POLYMÈRES OPTOÉLECTRONIQUES ET DISPOSITIFS PROVENANT DE CELLES-CI
申请人:GEN ELECTRIC
公开号:WO2008156928A1
公开(公告)日:2008-12-24
[EN] In one aspect, the invention provides a polyarylether having pendant carbazolyl groups. The polymers of the invention are made by the bromination of a polyarylether, which is then reacted with a carbazole moiety. The polymers may have some amount of unsubstituted aromatic groups and some brominated aromatic groups also. These polymers find use in optoelectronic device. Thus, in another aspect, the invention provides optoelectronic device comprising a polyarylether having pendant carbazolyl groups. [FR] L'invention concerne, selon un premier aspect un poliaryléther comportant des groupements carbazolyles latéraux. Les polymères de l'invention sont réalisés grâce à la bromuration d'un poliaryléther que l'on fait ensuite réagir avec un groupe caractéristique de carbazole. Les polymères peuvent avoir une certaine quantité de groupements aromatiques non substitués et également certains groupes aromatiques bromés. Ces polymères trouvent leur utilisation dans un dispositif électronique. Ainsi, selon un autre aspect, l'invention concerne un dispositif optoélectronique comprenant un poliaryléther comportant des groupements carbazolyles latéraux.
Reactivity and Product Analysis of a Pair of Cumyloxyl and <i>tert</i>-Butoxyl Radicals Generated in Photolysis of <i>tert</i>-Butyl Cumyl Peroxide
作者:Ryoko Oyama、Manabu Abe
DOI:10.1021/acs.joc.0c01016
日期:2020.7.2
Alkoxylradicals play important roles in various fields of chemistry. Understanding their reactivity is essential to applying their chemistry for industrial and biological purposes. Hydrogen-atom transfer and C–C β-scission reactions have been reported from alkoxylradicals. The ratios of these two processes were investigated using cumyloxyl (CumO•) and tert-butoxyl radicals (t-BuO•), respectively