Patent ID: 8593715

Claim:
An electrochromic compound represented by a general formula of wherein each of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 , and X 9 is independently a hydrogen atom, a halogen group, a hydroxyl group, a nitro group, a cyano group, a carboxyl group, a substituted or non-substituted alkoxycarbonyl group, a substituted or non-substituted aryloxycarbonyl group, a substituted or non-substituted alkylcarbonyl group, a substituted or non-substituted arylcarbonyl group, an aminocarbonyl group, a substituted or non-substituted monoalkylaminocarbonyl group, a substituted or non-substituted dialkylaminocarbonyl group, a substituted or non-substituted monoarylaminocarbonyl group, a substituted or non-substituted diarylaminocarbonyl group, a sulfonate group, a substituted or non-substituted alkoxysulfonyl group, a substituted or non-substituted aryloxysulfonyl group, a substituted or non-substituted alkylsulfonyl group, a substituted or non-substituted arylsulfonyl group, an aminosulfonyl group, a substituted or non-substituted monoalkylaminosulfonyl group, a substituted or non-substituted dialkylaminosulfonyl group, a substituted or non-substituted monoarylaminosulfonyl group, a substituted or non-substituted diarylaminosulfonyl group, an amino group, a substituted or non-substituted monoalkylamino group, a substituted or non-substituted dialkylamino group, a substituted or non-substituted alkyl group, a substituted or non-substituted alkenyl group, a substituted or non-substituted alkynyl group, a substituted or non-substituted aryl group, a substituted or non-substituted alkoxy group, a substituted or non-substituted aryloxy group, a substituted or non-substituted alkylthio group, a substituted or non-substituted arylthio group, or a substituted or non-substituted heterocyclic group, each of R 1 and R 2 is independently a substituted or non-substituted alkyl group, a substituted or non-substituted alkenyl group, a substituted or non-substituted alkynyl group, or a substituted or non-substituted aryl group, E is an oxy group, a thio group, or a seleno group, each of A − and B − is independently a monovalent anion, and R 1 and/or R 2 may be substituted with one or more kinds of functional groups selected from the group consisting of a sulfonate group, a phosphonate group, a phosphate group, and a carboxyl group.