Patent ID: 7319038

Claim:
A polymer comprising the reaction product of: (a) a macrocyclic transition metal complex of the general formula: wherein M is a transition metal ion; D 1 , D 2 , D 3 and D 4 can be the same or different and can be N or P; and each of R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , and R 7 and R 8 , taken together with the adjacent carbon atoms to which they are bonded, are joined together to form the same or different group selected from an aromatic or a cyclic group with at least one of the aromatic or cyclic groups possessing one or more polymerizable moieties; (b) monomer; and (c) optional crosslinking agent, wherein said polymer undergoes a detectable color change upon exposure to a biogenic amine.