Organic electroluminescent devices and methods of making organic electroluminescent devices are described. The organic electroluminescent devices include an organic emissive element that is positioned between two electrodes. The organic emissive element contains a trans-1,2-bis(acenyl)ethylene compound where the acenyl group is selected from 2-naphthyl, 2-anthracenyl, or 2-tetracenyl.
Unsaturated compounds, in particular alkenyl ketones and cyano analogues, useful for polymerization with a variety of monomers to form photodegradable polymers, are formed by dehydrating a preformed liquid alkanol of the formula:
where X is an activating group for this dehydration reaction, preferably -CO- or -CN, in the presence of a solid dehydration catalyst, which may be acid resin, alumina or mixtures thereof. Apparatus for carrying out the method and novel products also are described.
不饱和化合物,特别是烯基酮类和氰基类似物,可与各种单体聚合形成光降解聚合物,其形成方法是将预制的液态烷醇进行脱水反应:
其中 X 是该脱水反应的活化基团,最好是 -CO- 或 -CN,在固体脱水催化剂(可以是酸性树脂、氧化铝或它们的混合物)存在下进行。此外,还介绍了实施该方法的装置和新型产品。
Baked composition
申请人:Nestec S.A.
公开号:EP2000032A1
公开(公告)日:2008-12-10
The present invention relates to a baked foodstuff with an improved flavour and an improved texture. Also to compositions for generating these improved flavours and textures in baked foodstuffs which compositions comprise non pre-reacted flavour precursors which react on heating to generate the flavours.