Provided is a siloxane compound and the like containing the structures indicated by formula (1) and formula (2). (In formula (1), R1 and R2 individually represent a hydrogen atom, a halogen atom, an alkyl group having 1-3 carbon atoms, a halogenated alkyl group, a thiol group, an acetyl group, a hydroxyl group, a sulfonic acid group, a sulfoalkoxyl group having 1-3 atoms, or an alkoxyl group having 1-3 carbons atoms, and x and y individually represent an integer of 0-4. A represents a single bond, an azomethine group, an ester group, an amide group, an azoxy group, an azo group, an ethylene group, or an acetylene group.) (In formula (2), R3 and R4 individually represent an alkyl group, a phenyl group, or a substituted phenyl group and n is an integer of 1-100.).