ChemInform Abstract: Synthesis and Study of Crystal Structure of the Product of Combined Condensation of 2‐Amino‐5‐ethyl‐1,3,4‐thiadiazole with Salicylic Aldehyde and Acetylacetone.

The use of polyvinyl chloride in practice is associated with many difficulties due to the hydrophobic nature of the polymer surface. This can lead to great adverse consequences when used in technological processes of the chemical industry and hydrometallurgy. Due to its high hydrophobicity and low surface free energy, PVC has a low degree of wettability with water, resulting in low ion sorption capacity, as well as undesirable protein absorption and bacterial adhesion. The aim of the work was to increase the hydrophilicity of the surface of industrially produced powdered PVC by modifying it with various organic amines and, as a result, hydrophilic ion-exchange materials of various structures and morphology will be obtained on its basis. The course of the reactions was studied by potentiometric titration, IR spectroscopy, and diffractionometry. The correlation between the morphology and chemical properties of the products obtained in the studied reactions and the formation of new covalent bonds in the structure of the polymer matrix was investigated using IR spectroscopy and diffractionometry. The influence of the nature of the modifying reagent, solvent and temperature on the modification process has been established.

Section: Resultsmentioning

confidence: 99%

Investigation of the structure and morphology of modified materials based on polyvinyl chloride

Juraev,

Karimov,

Rustamov

et al. 2024

“…Amino acids are physiologically active substances and form the main links in the protein structure, so the study of their physicochemical properties is of great theoretical and practical interest. L-glutamic acid is a structural element of the protein molecule and has a number of properties that allow it to be used as a physiologically active drug [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Equilibrium of the solubility isotherm in systems Cobalt(II) chloride-glutamic acid-water

Aliev,

Ernazarov,

Khusenov

et al. 2024

The study is focused on the interaction between glutamic acid and hexavodic cobalt chloride. The solubility curve, influenced by the high solubility of the initial components, extends horizontally along a catheter corresponding to the cobalt chloride content. The secretion of glutamic acid exhibits a gradual increase over a relatively extended period. As the cobalt chloride concentration in the solution reaches 25.04%, a new phase emerges, resulting from the molecular interaction of the reactants, forming a double dihydrous compound comprising one molecule of glutamic acid and cobalt chloride: C5H9NO4∙CoCl2.

“…Since the linearity of the experiments was 0.9949, the detection limit for amygdalin was 0.88 and 2.93 mg, respectively. [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and thermal studies of mixed ligand coordination compounds of cobalt (II) with aspartic and dicarboxylic acids

Khusenov,

Zayniddinova,

Aliev

et al. 2024

The synthesis of complex compounds of cobalt (II) ion in the presence of aspartic and dicarboxylic acids has been studied by thermal and spectroscopic methods. Thermal decomposition processes of these compounds are studied on the basis of thermal analysis, and endo- and exoeffects are determined. The decomposition products of the compounds were studied on the basis of mass reduction by the thermogravimetric method. Based on the results of spectroscopic studies, the structural formulas of the synthesized coordination compounds are established.