Data from potentiometric titrations of Eu(CF(3)SO(3))(3) by Me(4)NOH in 80% v/v DMSO/water agree equally well with formation of two sets of hydroxo complexes: either Eu(2)OH(5+) and Eu(OH)(n)(3-n) (n = 1-3) or Eu(2)OH(5+), Eu(2)(OH)(2)(4+), Eu(2)(OH)(5)(+) and Eu(OH)(3). Studies using direct excitation luminescence spectroscopy and time-resolved decay measurements of Eu(III) solutions containin...

Extraction-separation of Eu(III) and Th(IV) ions from nitrate media into the ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate by a phosphorylated salen extractant, bis(chlorophosphoryle)decahydro-2,4-di(2-hydroxyphenyl)benzo[d][1,3,6]oxadiazepine (DPO), is investigated. It is found that Eu(III) ions are extracted via a solvation mechanism, and the extraction of Th(IV) i...

In this paper, we report on the impact of the structure of ligands on the luminescence enhancement of Eu(III) by directly exciting Eu(III) with visible light in aqueous media. Upon replacing the water molecules that coordinated around a Eu(3+) ion with a ditopic ligand 1,11-bis(2,6-dicarboxypyridin-4-yloxy)-3,6,9-trioxaundecane (L2EO4) or ethylenediaminetetraacetic acid disodium salt (EDTA), si...

We report a new complex Eu(tta)(3).bpt (tta = thenoyltrifluoroacetonate; bpt = 2-(N,N-di-ethylanilin-4-yl)-4,6-bis(pyrazol-1-yl)-1,3,5-triazine) with excellent long-wavelength sensitized luminescent properties, in which four hydrogen atoms replace the methyl groups at the 3,3'- and 5,5'-positions of the pyrazolyl rings in a previously reported complex Eu(tta)(3).dpbt. Upon visible-light excitat...

Background This article assesses the global health policies of the European Union (EU) and those of its individual member states. So far EU and public health scholars have paid little heed to this, despite the large budgets involved in this area. While the European Commission has attempted to define the ‘EU role in Global Health’ in 2010, member states are active in the domain of global health ...

Layered oxides intercalated with Eu ions were prepared by self-assembly deposition method based on the electrostatic interaction between negative charged oxide nanosheets and Eu ions. The layered oxides were composed of two-dimensional host nanosheet layer with guest Eu ions and gave Eu emission based on an energy transfer from bandgap excitation of the host oxide nanosheets to the Eu ions. The...