Polyphenylene compound

Abstract

This is to provide a non-halogen containing compound excellent in proton conductivity and capable of suitably being used for a polymer electrolytic fuel cell The compound of the present invention has a structure represented by the following general formula (I). (In the above-mentioned general formula (I), “l” and “n” are molar fractions when l+n=1.0, and 0≤l<1.0 and 0<n≤1.0, A represents a structure represented by the following general formula (II) or (III), B represents a structure represented by the following general formula (VII), the respective structural units are random copolymerized, and at least one benzene ring in the formula (I) has at least one sulfo group.) (In the above-mentioned general formula (II) or (III), R1 to R4 are each independently selected from hydrogen and an alkyl group having 1 to 3 carbon atoms, le and R2 form together with the carbon atom, they are attached to, an aromatic ring or a fused aromatic ring and R3 and R4 form together with the carbon atom, they are attached to, an aromatic ring or a fused aromatic ring, or R1, R3 and R4 are hydrogens and R2 is a single bond and bonded to the carbon of “c”, X is a single bond, or a structure represented by the following formula (IV), the following formula (V) or the following formula (VI), when X is a single bond, bonds “a”s are both bonded at ortho positions or both bonded at meta positions relative to the carbons bonded to X, when X is a structure represented by the following formula (IV), bonds “a”s are both bonded at para positions relative to the carbons bonded to X, and when it is a structure represented by the following formula (V), bonds “a”s are both bonded at para positions or both bonded at meta positions relative to the carbons bonded to x, when X is a structure represented by the following formula (VI), the bonds “a”s in the above-mentioned general formula (II) or (III) exist only one of these, and A binds to other structure or a structural unit by one of the bonds “a”s and the bond “b”.)

Dependencies are inferred from the claim text.