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Syntheses, structural and spectroscopic investigation (IR, NMR and luminescence) of new terbium and europium acylpyrazolonates |
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| Authors: | Claudio Pettinari Fabio Marchetti Andrey Drozdov Ivan Timokhin Vera Tsaryuk |
| Institution: | a Dipartimento di Scienze Chimiche, Università degli Studi, via S. Agostino 1, 62032 Camerino, Italy b Chemistry Department, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia c Institute of Radioengineering and Electronics of RAS, 11 Mokhovaya Street, 103907 Moscow, Russia |
| Abstract: | The synthesis and characterization of new lanthanide complexes of formulae M(Q)3(H2O)(EtOH)], NBu4M(Q)4] and M(Q)3(L)] (M = Eu or Tb; HQ = 1-phenyl-3-methyl-4-R-pyrazol-5-one: R = cyclopentylcarbonyl, HQ = HQCP; R = cyclopentylpropionyl, HQ = HQEtCP; L = 1,10-phenanthroline (phen) or 4,7-diphenyl-1,10-phenanthroline (bathophen)) are reported. The crystal structure of the tetrakis (β-diketonate) complex NBu4]Eu(QETCP)4] containing an eight-coordinated Eu atom in a distorted square antiprismatic environment has been determined. Luminescence studies have been performed on selected derivatives: the data suggested a strong influence of the nature of the acyl moiety in Q ligands and of Ph groups in bathophen (with respect to phen) on the luminescence properties. |
| Keywords: | β-Diketones Lanthanides Luminescence Structures NMR |
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