INFLUENCE ON LUMINESCENT PROPERTIES OF THE AGGREGATE STATE OF LANTHANIDE β-DIKETONATES
Journal Title: Вісник Одеського національного університету. Хімія - Year 2018, Vol 23, Issue 1
Abstract
The complexes Eu3+ and Tb3+ with thienyl, phenyl and alkyl derivatives of acetylacetone with different chain length and the structure of the fl uorinated substituent (RF) were studied. In accordance with the triplet levels of β-diketones, in the complexes the energy transfer from them to the Eu3+ ion is possible with all the reagents used, and to the Tb3+ ion only in complexes with the phenyl and alkyl derivatives of acetylacetone. The intensity of the luminescence of Eu3+ and Tb3+ complexes is found to increase in solutions in the transition from non-fl uorinated β-diketones to fluorinated ones and also with the extension of RF: CF3–C3F7–C6F13–C8F17. However, in the transition to the sorbates of these complexes on PMMA and their fi lms, with RF elongation, their luminescence intensity is decreased, which may be due to steric hindrances for coordination of the Ln3+ ion with PMMA produced by the long fl uoroalkyl substituent. In connection with this, in a solid form, the luminescence intensity of Eu3+ and Tb3+ complexes with fluorinated β-diketones is the higher, the shorter the RF. However, with all the β-diketones studied, the luminescence intensity of the Eu3+ and Tb3+ complexes increases by 1-3 orders of magnitude when passing from solution to solid state. The measured lifetimes of the luminescence of Eu3+ and Tb3+ complexes with fluorinated β-diketones for sorbates and films are 1.5-2.6 times higher than the corresponding values for solutions. In addition, the investigated complex compounds showed a sufficiently high photostability to short-wave radiation under continuous irradiation, which can be used to expand the possibility of their practical application in solving scientific and scientific technical problems.
Authors and Affiliations
S. B. Meshkova, P. G. Doga, A. A. Kucher
Keywords
Related Articles
- EP ID EP493642
- DOI 10.18524/2304-0947.2018.1(65).124548
- Views 67
- Downloads 0
INDICATING ADSORBENTS BASED ON THE REACTIVITY POLYMERS
The basic principles of synthesis of granulated indicator adsorbents of the new generation with a visual determination of the moment of the operation end are described in the present paper. Adsorbents are designed to equ...
A NEW METHOD FOR PREPARING 6-NITRO-2-(4-BOC-PIPERAZIN-1-YL)-3H-QUINAZOLIN-4-ONE
The 2-amino-3H-quinazolin-4-one scaffold is found in a large number of molecules with physiological significance and pharmaceutical utility. Previously we synthesized a series of potent antagonists of fibrinogen receptor...
THE SORPTION OF OFLOXACIN BY HYDRATED ALUMINA AND SILICON
The sorption of ofloxacin (OFL) – the antibiotic from class of fluoroquinolones has been studied on alumina (γ-Al2O3) different acid-base modifications – acidic Al2O3(acidic), neutral Al2O3 (Neutral) and the basic Al2O3...
INFLUENCE ON LUMINESCENT PROPERTIES OF THE AGGREGATE STATE OF LANTHANIDE β-DIKETONATES
The complexes Eu3+ and Tb3+ with thienyl, phenyl and alkyl derivatives of acetylacetone with different chain length and the structure of the fl uorinated substituent (RF) were studied. In accordance with the triplet leve...
POLYMERIZATION IN SOLUTION AS A WAY TO OPTIMIZE THE SYNTHESIS OF BETA-DIKETONATE MACROINITIATORS BASED ON POLYMETHYLMETHACRYLATE
The polymerization of methyl methacrylate initiated by Co (II) 5-methyl-5-hexene-2,4-dionate (MHD-Co) solution in dimethylformamide, methyl ethyl ketone and toluene has been studied. It is shown that polymerization does...