abstract |
A perfluorinated aromatic compound represented by general formula (7): <IMAGE> (7) wherein R3 is a tetravalent perfluorinated aromatic group represented by formula (8): <IMAGE> (9) wherein (R4)s are the same, each being a carboxyl group or a cyano group, or two adjacent (R4)s combine to form a divalent group represented by formula (10): <IMAGE> (10) provided that when R4 is a cyano group, R3 denotes said tetravalent perfluorinated aromatic group represented by formula (9). |