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

Victor F Shul'gin; Oleg V Konnik; Susana V Abkhairova; Alexey N Gusev; Svetlana B Meshkova; Anna V Kiriyak; Eduard B Rusanov; Miki Hasegawa; Wolfgang Linert

doi:10.1016/j.ica.2013.03.044

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

Inorganica Chim Acta. 2013 Jun 1;402(100):33-38. doi: 10.1016/j.ica.2013.03.044.

Authors

Victor F Shul'gin¹, Oleg V Konnik, Susana V Abkhairova, Alexey N Gusev, Svetlana B Meshkova, Anna V Kiriyak, Eduard B Rusanov, Miki Hasegawa, Wolfgang Linert

Affiliation

¹ Taurida National V.I. Vernadsky University, Simferopol 95007, Ukraine.

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 solid state, whereas the Eu^III and Nd^III complexes show low luminescence activity.

Keywords: 4-Formyl-pyrazol-5-one; Crystal structure; Lanthanide complexes; Luminescence.