Patent ID: 7528261

Claim:
A small molecule compound consisting of at least one type of an indolocarbazole moiety and at least one divalent linkage, wherein the at least one divalent linkage is independently selected from the group consisting of: wherein the indolocarbazole moiety is independently selected from the group consisting of structures (A), (B), (C), (D), (E), (F), and (G): wherein for each of the structures (A) through (G), each R is independently selected from a group consisting of a hydrogen, a hydrocarbon group and a heteroatom-containing group, wherein the hydrocarbon group has from 1 to about 30 carbon atoms and is independently selected from the group consisting of: a straight chain alkyl group, a branched alkyl group, a cyclic aliphatic group, an aryl group, an alkylaryl group, and an arylalkyl group, wherein the heteroatom-containing group is independently selected from the group consisting of: fluoroalkyl having for example 1 to about 18 carbon atoms, fluoroaryl, cyano, nitro, carbonyl, carboxylate, alkoxy having for example 1 to about 18 carbon atoms, and amino.