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Two coordination polymers of lanthanide complexes [(Dy)2(3,5-PDA)3(H2O)2]n 1 and [(Pr)2(3,5-PDA)3(H2O)3]n 2 (3,5-PDA = pyridine-3,5-dicarboxylate) have been synthesized under hydrothermal conditions. The prepared compounds were characterized by elemental