Chemical structure and reactivity of coordination compounds / Laboratory of Coordination Chemistry of Transition Elements
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Main areas of workSynthesis of new coordination compounds of d- and f-transition metals: Ti, Zr, Hf, Nb, Ta, Mo, W, U, Re, Cu and REE with bi- and polydentate ligands, including organometallic clusters in a hydrocarbon matrix. The study of their structure, geometric and optical isomerism in solutions and in the solid phase. The study of the mutual influence of ligands in the coordination sphere of mixed complexes of metal fluorides and the establishment of differences in the basic properties of the donor centers coordinated to the central ion.
The study of the physicochemical properties of the synthesized compounds by experimental - NMR, XRD, MALDI-TOF, EXAFS, EPR, XPS, AFM, SEM and computational methods.
Development of low-temperature methods for the synthesis of refractory dioxides of d- and f-transition metals containing nanoscale fractions and nanocomposites of refractory stoichiometric carbides in the matrix of fine carbon - promising catalysts and functional materials.
Study of the mechanism of extraction separation and purification of d- and f-transition metals based on coordination compounds and the development of ion-selective membrane membranes.
The most significant results
The features of the coordination behavior of transition metals of groups IV and V have been established. Conformational isomerism of the seven-membered chelate ring was found in the [η2-OPPh2 (CH2) 2C (NMe2) O] TiF4 complex in solution and single crystal. Direct evidence of the formation of nanosized molybdenum clusters was obtained and their thermodynamic stability and structure were confirmed by quantum chemical calculations. The mechanisms of extraction separation of antimony and tantalum from fluoride solutions and extraction of uranium from fluoride-carbonate solutions were studied. The reactions of coordinated ligands in uranyl complexes were studied for the first time.
Low-temperature methods for producing uranium dioxide powder and plutonium dioxide solid solution powder in uranium dioxide - MOX-fuel containing nanoscale fractions are proposed and patented (in cooperation with ROSATOM JSC and GEOKHI RAS).
An energy-saving method for the synthesis of a nanocomposite — Mo2C in a matrix of carbon nanotubes — a catalyst for converting natural oils into high-quality diesel fuel — has been developed.
A low-temperature method for the synthesis of nano-sized MoO2, a promising catalyst and electrode material, was proposed and implemented. The stability of symmetric closed structures of clusters of nonstoichiometric molybdenum oxides found in the gas phase is shown.
The composition of the membrane for the determination of the octahydroborate anion was developed and patented.
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