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p-Methoxybenzoyl-benzoylmethane(HA)and its complexes LnA<sub>4</sub>QH and LnA<sub>3</sub>·xH<sub>2</sub>O(for Ln=La~Yb,Q=n-tributyl amine,diethyl amine,hexahydropyridine)were synthesized and characterized by eleme