Patent ID: 8274213

Claim:
An electrochromic material comprising a compound of Formula 1: wherein R 1 is selected from the group consisting of a single bond, a C 6 -C 50 aryl group which is unsubstituted or substituted with at least one group selected from halo, hydroxyl, amino, cyano, nitro, thienyl, C 1 -C 7 alkyl and C 2 -C 7 alkenyl, a C 5 -C 50 heteroaryl group which is unsubstituted or substituted with at least one group selected from halo, hydroxyl, amino, cyano, nitro, thienyl, C 1 -C 7 alkyl and C 2 -C 7 alkenyl, a thienyl group, a bithienyl group, a C 2 -C 20 alkenyl group conjugated with at least one heteroatom selected from S and O or with the isophthalate groups at both ends thereof, a C 2 -C 20 alkynyl group, a C 3 -C 20 alkenylalkyl group, a C 3 -C 20 alkynylalkyl group and a C 4 -C 20 alkenylalkynyl group, wherein each R 2 is independently —(CH 2 ) m —, wherein m is an integer from 1 to 10, and wherein each R 3 is independently selected from the group consisting of —CH═CH 2 , a C 1 -C 10 linear, branched or cyclic alkyl group and a C 2 -C 10 linear or branched alkenyl group.