| 摘要 |
Novel aryl ethers, containing both a carboxylic acid and a sulfonic acid functionality; and a process for making them are described. These difunctional aryl compounds comprise: i) a carboxylic acid group or its derivative, ii) a first aromatic group bonded to the carboxylic acid or its derivative, iii) a second aromatic group linked to the first aromatic group by a non-electron-withdrawing moiety, iv) a third aromatic group linked to the second aromatic group by a non-electron-withdrawing moiety, and v) a sulfonyl group or its derivative bonded to the third aromatic group.
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