An enantioselective Diels–Alder reaction of 1,2-dihydropyridines with α-acyloxyacroleins catalyzed by a chiral primary ammonium salt has been developed.
Optical Film and Method for Manufacturing the Same
申请人:Yamahara Motohiro
公开号:US20090104378A1
公开(公告)日:2009-04-23
This invention provides an optical film, which can freely regulate the tilt angle and can easily be manufactured without simultaneously regulating polymerization and mixing, and a method for manufacturing the same. The optical film is a film having birefringence. The film has been produced by association through an intermolecular hydrogen bond between at least two compounds having a refractive index anisotropy-providing structure and a proton-receptive group and at least one compound having a refractive index anisotropy-providing structure and a proton-providing group. The method for manufacturing the optical film comprises mixing at least two compounds having a refractive index anisotropy-providing structure and a proton-receptive group with at least one compound having a refractive index anisotropy-providing structure and a proton-providing group and forming a film from the mixture on an aligning film.
Effenberger, Franz; Mueck, Alfred Otto; Bessey, Eberhard, Chemische Berichte, 1980, vol. 113, # 6, p. 2086 - 2099
作者:Effenberger, Franz、Mueck, Alfred Otto、Bessey, Eberhard
DOI:——
日期:——
EFFENBERGER F.; MUECK A. O.; BESSEY E., CHEM. BER., 1980, 113, NO 6, 2086-2099
作者:EFFENBERGER F.、 MUECK A. O.、 BESSEY E.
DOI:——
日期:——
INKLESS REIMAGEABLE PRINTING PAPER AND METHOD
申请人:KAZMAIER Peter M.
公开号:US20080311489A1
公开(公告)日:2008-12-18
An image forming medium includes a substrate and an imaging layer coated on or impregnated into a substrate, where the imaging layer is formed of an imaging composition that includes a solvent or a polymeric binder, and a photochromic material selected from substituted fulgides and substituted dithienylethenes, dissolved or dispersed in the solvent or polymeric binder, and where the imaging composition exhibits a reversible homogeneous-heterogeneous transition between a colorless state, an intermediate colorless or colored erasable state, and a final colored stable state, the photochromic material converting from the colorless state to the colored stable state upon irradiation with light of a first wavelength and converting from the colored stable state to the colorless state upon exposure to heat and light.