Patent ID: 8546505

Claim:
A compound represented by the formulas: wherein: each optional R4′, R4″, R4′″, or R4″″ group is independently selected from one or more C 1-20 alkyl, aryl, or alkoxy groups, each x is an independently selected integer 0, 1, 2, 3 or 4, Y is selected from the group consisting of carbazole, purine, indole, indoline, carboline, naphthalene, azulene, anthracene, phenanthrene, benzene, phenyl, pyridine, pyrrole, oxazole, thiazole, pyrrole, imidazole, furan, thiophene, triazole, pyrazole, isoxazole, pyrazine, pyridazine, and triazine rings, wherein; M 1 and M 3 are optional or independently selected from and are bound to the norbornene, Y, or carbazole groups at the positions indicated by *; R 1 and R 2 are optional independently selected C 1-20 alkane diyl, alkene diyl, alkyne diyl, or arene diyl groups; and optional M 2 is a C 1-20 alkane diyl, alkene diyl, or arene diyl group.