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<正>Dicarboxyl-functionalized salen ligand 1,2-phenylendiamine-N,N?-bis(3-tert-butyl- 5- (carboxyl)-salicylide-ene (H_4L) was synthesized in good yield from 3-tert-butyl-5-formyl-4-hy- droxybenzoic acid and used to construct a 2D zinc complex, [(ZnL)