Determination of Metals and Radionuclides by Newest Functionalized Reagents in Liquid Media

Abstract

The conditions for the formation of metal complexes (aluminium, radionuclides) in solutions are considered. The properties of solid extractants (TVEX) and their application for the selective extraction of metals and radionuclides are discussed. The extraction of 90Sr, 90Y, 137Cs and U(VI) radionuclides from aqueous TVEX solutions impregnated with calixarenes C45 and CIP67 has been studied. The use of surfactants in combination with OAR (PA) is a typical example of the fact that the analytical capabilities of even well-known reagents are far from exhausted, and the use of functionalized reagents can significantly improve the basic analytical characteristics of metal detection.

Complexation of Flavonoids: Spectral Phenomena, Regioselectivity, Interplay with Charge and Proton Transfer

“…To understand the influence of some of the factors listed above, the theoretical investigations of 3,5-dihydroxy flavonol chelating with Be 2 + , Mg 2 + , Al 3 + , Ga 3 + , Zn 2 + , Cd 2 + , and BF 2 + ions in acetonitrile medium were performed using DFT method. [96] The analysis of the values of ΔH 0 f,298 for ML complexes showed that in the case of small ions (Be 2 + , BF 2…”

“…The formation of the triphenyl borane complex is visible in absorption spectra, but in fluorescence spectra, the only band of phototautomer is always present. [96,112]…”