Anionic lanthanide complexes with 3-methyl-1-phenyl-4-formylpyrazole-5-one and hydroxonium as counter ion.

ABSTRACT: A series of [H₃O]⁺[LnL₄]^-·nH₂O complexes (n = 1-3, Ln = Nd, (1), Sm (2), Eu (3), Tb (4); HL = 3-methyl-1-phenyl-4-formylpyrazole-5-one) were synthesized and characterized. The structures of the Sm^III and Eu^III complexes were investigated by X-ray diffraction. The isostructutal crystalls 2 and 3 consist the tetrakis [LnL₄]^- anions which are linked by H-bonding with the hydroxonium counter-ion and water molecules. The lanthanide ion is situated in the center of distorted tetragonal antiprism formed by eight oxygen atoms of 4-formyl-5-hydroxypyrazolonate anions. The Tb^III and Sm^III complexes show strong luminescence in

SUBMITTER: Shul'gin VF 

PROVIDER: S-EPMC3688536 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature