Reaction of acetylacetone-S-methyl-thiosemicarbazone and 4-methoxy-salicylaldehyde in presence of Fe(ClO4)3 and NaN3 resulted in a mixed ligand complex, [Fe(L)N3], where L is N2O2-chelating thiosemicarbazidato ligand formed by template condensation. The first iron complex of the thiosemicarbazid...

Previous determinations of rare earth element (REE) complexation by silicate have been confined to observations of Eu(SiO(OH)3)2 + formation. Critical assessment of these observations reveals order-of-magnitude ambiguities in the stability constants derived from a variety of experimental designs...

This study compared the binding of europium by soil and aquatic natural organic matter (NOM) exemplified by Pahokee Peat humic acid (PPHA) and Northern Reservoir NOM, respectively. NOM/Eu3+ interactions were measured based on the differential absorbance approach. The experimental results show th...

A simple scheme for preparation of europium hydrogen squarate octahydrate microcrystals, Eu(HSq)3·8H2O is demonstrated. The microcrystalline powders obtained have a potential application as non-centrosymmetric and UV radiation – protective hybrid optical material. The site-symmetry of the Eu –...

Two novel binary and ternary Europium (III) perchlorate complexes were synthesized. The binary complex was prepared with bis(benzylsulfinyl)methane as ligand, and the ternary complex was with bis(benzylsulfinyl)methane as first ligand and 1,10-Phenanthroline as second ligand. They were character...

The structure of trans-[Cr(2,2,3-tet)F2]ClO4 (2,2,3-tet = 1,4,7,11-tetraazaundecane) has been determined by single-crystal X-ray diffraction. The complex crystallizes in the space group P 1‾ of the triclinic system with two mononuclear formula units in a cell of dimensions a = 5.6741(11), b = 9...

A new complex trans-anti-[Cr(Me2tn)2(N3)2]ClO4·2H2O, where Me2tn = 2,2-dimethyl-1,3-propanediamine was synthesized and characterized, and its molecular structure was established by single-crystal X-ray diffraction at 95 K. The complex crystallized in the space group C2/c of the monoclinic syste...

A new double complex, [trans-Cr(N3)2(Me2tn)2]3[Cr(N3)4(Me2tn)]2ClO4 (Me2tn = 2,2-dimethylpropane-1,3-diamine), was prepared, and its structure determined through single-crystal X-ray diffraction at 100 K. The complex crystallizes in the space group C2/c of the monoclinic system with a = 34.255 (...

This work presents the results of a study of the Tm3+/Tm2+ and Yb3+/Yb2+ couple redox potentials vs. Cl–/Cl2 reference electrode at the temperature range (823 to 973) K in fused NaCl–KCl–CsCl eutectic by direct potentiometric method. Initial concentrations of TmCl3 and YbCl3 in solvents did n...

Thermal analysis, equilibration, and X-ray data are reported for the condensed TmCl3-Tm system. Thulium(II) chloride melts congruently at 718 ± 3 °C and is isostructural with DyCl2 and YbCl2 with a0 = 6.55, b0 = 6.68, c0 = 6.93 Å, all ± 0.02 Å. The dichloride dissolves in water to give a sh...

Thulium hexacyanoferrate (TmHCF) nanoparticles (NPs) were in situ synthesized within the chitosan film on the electrode surface by a biocatalyzed reaction. The properties of the obtained nanoparticles are characterized with scanning electron microscope (SEM) and energy-dispersive X-ray (EDX). Th...

This work presents the results of a study of the Tm3+/Tm2+ couple redox potentials vs. Cl–/Cl2 reference electrode at the temperature range (833 to 1073) K in molten equimolar NaCl–KCl and NaCl–2CsCl eutectic by direct potentiometric method. Initial concentrations of TmCl3 in solvents did not...

This work presents the results of a study of the Tm3+/Tm2+ and Yb3+/Yb2+ couple redox potentials vs. Cl−/Cl2 reference electrode at the temperature range (973 to 1123) K in molten CsCl by direct potentiometric method. Initial concentrations of TmCl3 and YbCl3 in solvents did not exceed 5.0 mol%....

The electrochemical behaviour of TmCl3 solutions was studied in the eutectic LiCl–KCl in the temperature range 673–823 K using inert and reactive electrodes, i.e. W and Al, respectively.On an inert electrode, Tm(III) ions are reduced to metallic thulium through two consecutive steps:Tm(III) + ...

Neutrophil gelatinase-associated lipocalin (NGAL) is a promising biomarker for diagnosing acute kidney injury (AKI). Currently, there are few assays for determining NGAL and they are complex, time-consuming or expensive. We aimed to establish an efficient immunoassay to measure NGAL in human uri...

We synthesized the novel inorganic-organic nanohybrid systems in hydroxyapatite (HA) nanocrystal growth processes under the presence of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium (III) (EuTH) complex for the first time. The nanohybrid states were successfully controlled by the EuTH con...

Biocompatible nanosystems exhibiting long-lifetime (∼millisecond) luminescence features are particularly relevant in the field of bioimaging. In this study, citrate-functionalized calcium-doped europium phosphates nanophosphors of the rhabdophane type were prepared at different synthesis times ...

We have synthesized novel inorganic–organic hybrid systems based on the interactions between calcium phosphate (CP) and tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium (III) (EuTH) complex to clarify the states of the EuTH molecules. We achieved the nucleation and crystal growth of electro...

α-Ti(HPO4)2·H2O (α-TiP) and its propylamine intercalation product, Ti(HPO4)2·2C3H7NH2·H2O (α-TiPPr), have been synthesized and characterized. Later, their sorption capacity for europium(III) was investigated, and this purpose was accomplished by treating α-TiP and α-TiPPr with europium(I...

The specific heat of samarium hydride, SmH2.84, was measured in the temperature range from 2–244 K. A λ-type specific heat anomaly most probably due to a magnetic transition was found at TN = 25.8 ± 0.5 K. Schotty specific heat anomalies due to crystal field splitting effects were found and a...