Six-nuclear complexes of Platinum(II) with cleavage of a cystamine dihydrochloride by β-mercaptoethylamine with composition [Pt6(H2NCH2CH2S)8]Cl4•5H2O had been syntesized for the first time. Structure of the complex had been installed together with IKS-and XRD analysis. It has been established that each atom of platinum is surrounded by two atoms of sulfur and nitrogen due to bidentate coordination of a ligand. Only two of the six platinum atoms are on the same plane; other four atoms are in the different crossing planes. Four platinum atoms form adurable metal chelate cycles, which collapse over temperature 260˚C. The results of IR spectroscopy confirmed with the RS-analysis.
When the platinum (II) and palladium (II) salts interact with ligands such as cystamine-(mercamine) HSCH2CH2NH2 and 2-mercaptoethanol HSCH2CH2OH under certainconditions, polynuclear complexes of the compositions are obtained: [Pt6(SCH2CH2NH2)8]Cl4.5H2O and [Pd6(SCH2CH2OH)8]Cl4. In a comparative study of the IR and X-ray spectra of synthesized complexes and ligands, as well as the results of X-ray diffraction studies, it was established that sulfur atoms of 2-mercaptoethanol occupy a bridge positionwith mixed coordination of ligands in the palladium complex. In the platinum (II) complex bidentate coordination of ligands is realized through sulfur and nitrogen atoms.Ключевые слова: 2-меркаптоэтанол, цистеамин, комплексы платины, палладия, смешанная координация, мостиковое положение.
The work is devoted to the electrochemical deposition of Bi-Se thin films from ethylene glycol-based electrolytes. The studies have been carried out by potentiodynamic and galvanostatic methods under various conditions, using Pt and Ni electrodes. By recording cyclic and linear polarization curves, the potential range of deposition of thin Bi-Se films on Pt (-0.75 to -1.2 V) and Ni (0.2 to -0.85 V) electrodes was determined. A comparison of the polarization curves of two electrodes showed that co-electrodeposition of Bi and Se occurs in approximately the same potential range. In order to find the optimal mode and composition of the electrolyte, the effect of various factors (concentration of initial components, temperature, etc.) on the process of co-electrodeposition of Bi with Se was studied. In addition, the samples of Bi-Se thin films obtained on Ni electrodes using the galvanostatic method were studied by scanning electron microscope (SEM) and X-ray phase analysis. The results of X-ray phase analysis confirmed the formation of thin Bi2Se3 films with and without additional heat treatment step. Elemental analysis of obtained films carried out by EDS shows that films contained 62.79 wt. % Bi and 37.21 wt. % Se.
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