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Publications (15)
The reaction of 1,3-diketone containing 1-methyl-1H-pyrazol-4-yl and perfluoropropyl fragments with TbCl3·6H2O in the presence of NaOH in ethanol is studied. The molecular and crystal structures of the complex are studied by single-crystal X-ray diffraction (XRD). Compound [Tb(L)3(EtOH)2] crystallizes in the triclinic crystal system with the space...
Six new complexes of the ligand HQ cy (-4-(cyclohexanecarbonyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one) and Ln 3+ ions with emission in the near-infrared (Nd 3+) or visible and near-infrared (Sm 3+ , Pr 3+) spectral regions were synthesized and characterized using various methods , including single crystal X-ray diffraction. The study demon...
A new strategy for the easy polymerization of anionic [Ln(Q cy)4] − (HQ cy-4-(cyclohex-anecarbonyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one) into two-dimensional layers of [AgLn(Q cy)4]n (Ln = Sm, Eu, Gd, Tb and Dy) is proposed by binding the single molecular anions [Ln(Q cy)4] − to silver cations through the coordination of the pyridinic ni...
NIR emitting OLEDs (organic light-emitting diodes) with high photoluminescence quantum yields were developed on the basis of fluorinated 1,3-diketonate coordination compounds of the Nd3+ ion. Both thermal evaporation and spin-coating techniques were successfully employed for active layer deposition resulting in electroluminescence quantum yields up...
The reaction of 4,4,5,5,6,6,6-heptafluoro-1-(1-methyl-1H-pyrazol-4-yl)hexane-1,3-dione (HPyrC3F7) with freshly precipitated hydrated europium(ɪɪɪ) and samarium(ɪɪɪ) hydroxides in EtOH afforded crystalline complexes of the composition [Ln(PyrC3F7)3(EtOH)2], the features of their formation depending on the stoichiometric ligand/metal ratios were stud...
With the aim of creating new light emitting systems, two new dysprosium complexes of formula [DyQcy3(H2O)] (1-Dy) and [H3O][DyQcy4] (2-Dy) (where HQcy = 1-phenyl-3-methyl-4-cyclohexylcarbonyl-pyrazol-5-one) have been synthesized and characterized by spectroscopy. The reaction conditions to address the synthesis toward these tris-(diketonate)dyspros...
A series of neutral Yb³⁺ and Gd³⁺ complexes with isomeric 4,4,4-trifluoro-1-(naphthalenyl)butane-1,3-diones and 1,10-phenanthroline as an ancillary ligand were synthesized and characterized by a full range of analytical methods, including elemental analysis, FTIR and NMR spectroscopy, single crystal X-ray analysis, cyclic voltammetry (CVA) and ther...
A series of novel highly NIR-emitting Nd3+ complexes with specially designed 1,3-diketones bearing a pyrazole moiety and a linear CxF2x+1 group (x=1,3,6) was obtained and exhaustively investigated. It was demonstrated that for the complexes with an increased number of fluorine atoms, the triplet level energy of the ligands is decreased and phonon r...
Luminescence characteristics of Nd3+ coordination compounds with pyrazole-substituted 1,3-diketonate ligand environment in KBr micropellets are studied. The luminescence decay times and the external quantum efficiencies are measured, intrinsic luminescence lifetimes of the Nd3+ ion in the complexes are estimated. The luminescence characteristics of...
Two new Sm3+ complexes with pyrazolic β-diketones bearing a CF3 group acting as main ligands and with 2,2'-bipyridine or 1,10-phenanthroline being the ancillary ligand were studied, and their energy level structure was established. Stark splitting observed in the photoluminescence spectra of the complexes points to their non-cubic symmetry, confirm...
We studied luminescent properties of two Nd³⁺ complexes with two different ligands. The first one was 1,3-diketone bearing a pyrazole fragment and the second ligand was either 1,10-phenanthroline or EtOH. For the ligand environment composed of 1,3-diketone and 1,10-phenanthroline the position of the hybrid triplet level was as low as 18200 cm⁻¹. Th...
We studied luminescent properties of complex with pyrazole and 1, 10-phenanthroline ligand environment. It was demonstrated that the complex exhibits so-called “antenna” effect which involves the electronic excitation transfer from the ligands to the rare-earth ion. The observed complex structure of the luminescence spectrum specific to indicates t...