Aromatic sulfonic acid derivative, sulfonic acid group-containing polymer, block copolymer, polymer electrolyte material, polymer electrolyte form article, and polymer electrolyte fuel cell

摘要

Provided are an aromatic sulfonic acid derivative and a sulfonic acid group-containing polymer, each of which has excellent proton conductivity even under low humidification conditions, while having excellent mechanical strength and chemical stability, and enables a solid polymer fuel cell to achieve high output and excellent physical durability when used therein. This aromatic sulfonic acid derivative has a specific structure and is characterized in that a sulfonic acid group is introduced into more than 50% of all the phenyl groups. This sulfonic acid group-containing polymer is characterized by being obtained by polymerization using the aromatic sulfonic acid derivative, and is also characterized by having a specific structure.

主权项

1. A compound comprising an aromatic sulfonic acid derivative as represented by formula (M1), wherein a sulfonic acid group is contained in more than 50% of all phenyl groups: wherein, in the formula (M1), n1 is an integer of 1 or greater; a1 to a4 are each an integer of 0 or greater; M's are independently a hydrogen, a metal cation, an ammonium cation, or a hydrocarbon group with a carbon number of 1 to 20; X1's are independently a halogen atom; Y1 is an electron-withdrawing group; and Z1 is an electron-withdrawing group, —O—, —S—, or direct bonding.