Patent ID: 8822708

Claim:
A compound represented by the structure of Formula (IV): wherein X is S or O; wherein R 2 , represent mono, di, tri, tetra, or no substitutions; wherein R 1 ′ represents mono, di, or no substitutions; wherein each R 1 , R 1 ′, R 2 , and R 3 is an unfused substituent independently selected from the group consisting of H, C n H 2n+1 , OC n H 2n+1 , OAr 1 , N(C n H 2n+1 ) 2 , N(Ar 1 )(Ar 2 ), CH═CH—C n H 2n+1 , C≡CC n H 2n+1 , Ar 1 , Ar 1 —Ar 2 , C n H 2n —Ar 1 , wherein n is 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; wherein Ar 1 and Ar 2 are independently selected from the group consisting of benzene, biphenyl, naphthalene, triphenylene, carbazole, and heteroaromatic analogs thereof; and wherein at least one of R 1 , R 1 ′, R 2 , and R 3 comprises a triphenylene group.