The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2014
Filed:
Dec. 19, 2007
Poopathy Kathirgamanathan, North Harrow, GB;
Sivagnanasundram Surendrakumar, Middlesex, GB;
Poopathy Kathirgamanathan, North Harrow, GB;
Sivagnanasundram Surendrakumar, Middlesex, GB;
Merck Patent GmbH, Darmstadt, DE;
Abstract
In OLEDs, improved efficiency is obtained by using compounds of formula [Ar](CH═CH—R)wherein n is an integer from 1 to 4; [Ar] is a polycyclic aromatic or heteroaromatic scaffold optionally substituted with one or more alkyl or alkoxy groups; and Ris a 5-membered heteroaryl group optionally substituted with methyl, methoxy, aryl or heteroaryl, or is phenyl or naphthyl optionally substituted with methyl, methoxy, trifluoromethyl or cyano or is biphenyl or substituted biphenyl. The compounds are believed to be novel and can be made by condensing a compound of formula wherein [Ar] and n are as defined above with a compound of formula [Ar](CH3)RCHO in the presence of an acid catalyst e.g. an anhydride of an organic acid.