Patent ID: 7858799

Claim:
An ionic organic compound, having a repeating unit represented by formula (I): [Formula 1] [-(A-B-C) n -]•m(X) (I) wherein A represents a divalent quaternary ammonium cation-containing group derived from an aromatic heterocyclic compound containing at least one nitrogen atom, in which a left-ended bonding hand in formula (I) extends from the nitrogen atom of the quaternary ammonium cation, and in which a right-side bonding hand of A extends from a site other than said nitrogen atom in the aromatic heterocycle; B represents a functional group selected from an amide group, a urea group, a urethane group, and a peptide group, each of which may have a substituent; C represents an optionally substituted divalent aliphatic or aromatic hydrocarbon group linking A and B, in which B at the left side of C in formula (I) is linked, through said C, with A in the repeating unit -(A-B-C) n - being next to the right side of said C; X represents an anion; n represents the number of repeating units; m represents the total number of anions; and n and m are the same integer and are each an integer of 2 to 30.