Published in
Elsevier, Inorganica Chimica Acta, 12(359), p. 4063-4070
DOI: 10.1016/j.ica.2006.04.045
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Syntheses, spectroscopic characterization and X-ray structural studies of lanthanide complexes with adamantyl substituted 4-acylpyrazol-5-one
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Fabio Marchetti ,
Riccardo Pettinari ,
Paolo Natanti,
Andrey Drozdov,
Sergey Semenov,
Sergey I. Troyanov,
Vladislav Zolin
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Abstract
Synthesis and spectroscopic characterization of new lanthanide complexes [Ln(QAD)3(EtOH)(H2O)], (Ln=Tb, Eu; HQAD=1-phenyl-3-methyl-4-adamantylcarbonyl-pyrazol-5-one), [H3O][Tb(QAD)4], [Ln(QAD)3(N–N)] (Ln=Tb, Eu; N–N=1,10-phenanthroline (Phen), 2,2′-bipyridyl (Bipy), 4,4′-dimethyl-2,2′-bipyridyl (4,4′-Me2Bipy)) are reported. The crystal structures of the proligand HQAD and of complexes [H3O][Tb(QAD)4] and [Tb(QAD)3(4,4′-Me2Bipy)] have been determined. In both complexes the lanthanide ions are in a square antiprismatic environment, the H3O+ cation in the former acid complex being stabilized by H-bonding. Luminescence studies have been performed on selected derivatives.