Patent ID: 7439341
Filing Date: 2008-10-21
Classification: C07C,C07F,C07H,C09B,Y10T

Abstract:
1. A chemical composition for quenching light having the structure of Formula 1: wherein R 1-6 on the conjugated ring system are individually an electron withdrawing group, alkyl group, aryl group, hydrogen, heteroaryl group, or a five or six member ring structure formed from the R 1 , R 2 pair, the R 3 , R 4 pair, the R 4 , R 5 pair, or the R 5 , R 6 pair; and wherein R 7 is an unsubstituted or substituted aryl or heteroaryl group, the aryl or heteroaryl group being selected from the group consisting of phenyl, xylyl, tolyl, pyridyl, and anilyl groups, with the proviso that the aryl group is not an unsubstituted phenyl or tolyl, and wherein the anilyl group is a group of Formula 2: wherein L and L′ are the same or different and are a C 1-10 group, —C 1-10 —O—R 8 , or —C 1-10 —O—R 9 , wherein C 1-10 is a C 1-10 alkyl group, and wherein R 8 and R 9 are independently a hydrogen, trityl, alkoxytrityl, silyl, cyanoethylphosphoramidite, or phosphoramidite with the proviso that L and L′ are not both methyl, and when L or L′ is ethyl, then the other is not hydroxyethyl.