SPECTROPHOTOMETRIC RESEARCH INTO COMPLEXATION OF TUNGSTEN(VI) WITH o-HYDROXYTHIOPHENOL DERIVATIVES IN THE PRESENCE OF HYDROPHOBIC AMINES

Abstract

Spectrophotometric methods were used to study the reaction of complexation of tungsten with derivatives of o-hydroxythiophenol (HTPDs) {2-hydroxy-5-chlorothiophenol (HCTP), 2-hydroxy-5- bromothiophenol (HBTP) and 2-hydroxy-5-iodothiophenol (HITP )} in the presence of aminophenols. Aminophenols used were 2(N,N-dimethylaminomethyl)-4-chlorophenol (AP1) and 2(N,Ndimethylaminomethyl)-4-bromophenol (AP2), 2(N,N-dimethylaminomethyl) -4-iodophenol (AP3).Optimal conditions for the formation and extraction of mixed ligand complexes (MLC) were found, and the ratios of the components in the complexes established. It revealed that MLC are formed in a weakly acidic environment (рНopt 4.5-5.5). The maximum in the light absorption spectrum is observed at λ=460-490 nm. The molar coefficient of light absorption is equal to ε = (2.0-2.8) × 10 4 . Optimal conditions for the formation and extraction of these compounds is the concentration of (1.2-2.5) × 10-3 mol / l GTP and (2.0-2.8)×10-3 mol/l AP. The maximum optical density is reached within 5-8 minutes. Tungsten MLC extracts with HTP and AP obeys Beer's law at concentrations of 0.04–3.8 μg/5 ml. The proposed method was applied to determine Tungsten in steel and in soils.

LASER-INDUCED MODIFICATION ON SOME PROPERTIES OF PREPARED Cu(II) COMPLEXES

“…The chemical and physical parameters and conditions for obtaining of various d-elements with nitrogen and sulphur-containing ligands were analyzed [4,9]. Laser-induced modification on absorption, melting point, molar conductivity measurement of Cu(II) complexes were examined through considering the effect of the used laser irradiation on these properties for Cu(II) complexes (the samples are in liquid phases) by measuring these quantities before and after the exposure to laser radiation with different doses.…”

“…Also, the importance of the Cu complex currently lies in the fact that Cu may be used to cancer treatment [2]. Dithiocarbamate ligands coordinating through sulfur atoms with transition metals, dithiocarbamate complexes can present an extreme range of applications in chemistry, agriculture, medicine, and others [3,4]. The complexes with square planar shape of Ni(II) and Cu(II) with potassium-based dithiocarbamate are directly prepared [5].…”

Extraction-Photometric Determination of Iron(iii) in Oil and Oil Products of Baku Using 2-Hydroxy-5-Halogenthiophenol and Hydrophobic Amines

“…When one OH group is replaced by an SH group, the selectivity decreases, since elements with an affinity for sulfur interact with SH-containing reagents, and vice versa, the sensitivity increases [1]. Thioand dithiophenols as analytical reagents are constantly in the focus of attention of researchers [9][10][11][12][13][14]. This is due to the large range of these compounds, as well as the possibility of obtaining new substances based on well-studied thiophenols.…”