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Two crystals,[Sm(Hcpna)(cpna)·3 H2O]n(1) and [Eu(Hcpna)(cpna)·2 H2O]n(2),have been synthesized by solvothermal method based on Sm3+ and Eu3+ with multiple acid ligands5-(4-carboxyphenoxy)nicotinic acid(H2cpna), and the new complexes have been ch