Patent ID: 8652653

Claim:
A composition of matter having the chemical structure: wherein n is 1, 2 or 3, and the phenyl rings between the nitrogen atoms may be attached to each other and to the nitrogen atoms in a para or meta configuration independently selected for each attachment; wherein each of R 2 , R 3 and R 4 are independently selected from the group consisting of: wherein R 1 is selected from the group consisting of: wherein the dotted line shows the point of attachment to an N atom of Formula I; wherein at least one of R 2 , R 3 , and R 4 is selected from the group consisting of: wherein each of R 1 , R 2 , R 3 and R 4 may be further substituted with substituents that are not fused to R 1 , R 2 , R 3 and R 4 .