Patent ID: 7652151

Claim:
A composition comprising a ketopyrrole having structure XXIV wherein R 2 is independently at each occurrence a deuterium atom, a halogen, a nitro group, an amino group, a C 3 -C 40 aromatic radical, a C 2 -C 50 aliphatic radical, or a C 3 -C 40 cyclcoaliphatic radical; “a” is an integer from 0 to 3; and X 1 and X 2 are independently at each occurrence a bromine atom, a hydroxy group, or the group OR 10 , and wherein the group R 10 is independently at each occurrence a deuterium atom, a halogen, a nitro group, an amino group, a C 3 -C 40 aromatic radical, a C 1 -C 50 aliphatic radical, or a C 3 -C 40 cyclcoaliphatic radical.