Patent ID: 8610991

Claim:
An electrochromic compound represented by the following Chemical Formula 1: wherein, in Chemical Formula 1, Y is an N-containing aromatic ring group, X 1 − to X 4 − are each independently a monovalent anion, L 1 to L 4 are each independently a single bond, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C3 to C30 cycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, or a substituted or unsubstituted C2 to C30 heteroarylene group, and Z 1 and Z 2 are each independently a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C2 to C30 alkenyl group, a substituted or unsubstituted C1 to C30 fluoroalkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C6 to C30 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C6 to C30 aryloxy group, a substituted or unsubstituted C2 to C30 heteroaryl group, a phosphonic acid group, a carboxylic acid group, a sulfonic acid group, a hydroxyl group, or a thiol group, provided that at least one of Z 1 and Z 2 is a phosphonic acid group, a carboxylic acid group, a sulfonic acid group, a hydroxyl group, or a thiol group, and m and n each independently range from 0 to 4.