Novel aromatic sulfonic acid ester derivative, polyarylene, polyarylene having sulfonic acid group and process for producing the same, and polymer solid electrolyte and proton-conductive membrane

摘要

Disclosed is an aromatic sulfonic acid ester derivative represented by the formula (1); <CHEM> in the formula, X is an atom or a group selected from a halogen atom excluding fluorine, -OSO3CH3 and -OSO3CF3, A is a divalent electron attractive group, B is a divalent electron donating group or a direct bonding, R<a> is a hydrocarbon group of 1 to 20 carbon atoms, Ar is an aromatic group having a substituent of -SO3R<b> (wherein R<b> is a hydrocarbon group of 1 to 20 carbon atoms), m is an integer of 0 to 10, n is an integer of 0 to 10 and k is an integer of 1 to 4. Also disclosed is a process for producing a polyarylene having a sulfonic acid group, which process comprises the steps of coupling polymerization of an aromatic compound containing the derivative of the formula (1), to prepare a polyarylene and hydrolysis of the polyarylene, and which process has high safety and is easily capable of controlling the amount of sulfonoc acid group introduced into a polymer and the introducing position thereof.