Publications by authors named "Yuriy A Chesalov"
This work focuses on the comparison of H evolution in the hydrolysis of boron-containing hydrides (NaBH, NHBH, and (CHNHBH)) over the Co metal catalyst and the CoO-based catalysts. The CoO catalysts were activated in the reaction medium, and a small amount of CuO was added to activate CoO under the action of weaker reducers (NHBH, (CHNHBH)). The high activity of CoO has been previously associated with its reduced states (nanosized CoB).
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- Zr-based metal-organic frameworks (Zr-MOF) UiO-66 and UiO-67 show exceptional selectivity in catalyzing thioether oxidation, achieving 96-99% selectivity toward sulfones with around 50% sulfide conversion using just one equivalent of hydrogen peroxide.
- The reaction mechanism was explored through various multidisciplinary techniques, revealing a nucleophilic nature of the peroxo species involved, supported by multiple observations including nucleophilic parameters and competitive oxidation ratios.
- Additionally, the catalytic activity of Zr-MOFs extends to epoxidation reactions, highlighting a complex interplay between nucleophilic and electrophilic oxidizing species and underscoring the role of weak basic sites in enhancing their catalytic efficiency.
Properties of matrices manufactured by electrospinning from solutions of polyurethane Tecoflex EG-80A with gelatin in 1,1,1,3,3,3-hexafluoroisopropanol were studied. The concentration of gelatin added to the electrospinning solution was shown to influence the mechanical properties of matrices: the dependence of matrix tensile strength on protein concentration is described by a bell-shaped curve and an increase in gelatin concentration added to the elasticity of the samples. SEM, FTIR spectroscopy, and mechanical testing demonstrate that incubation of matrices in phosphate buffer changes the structure of the fibers and alters the polyurethane-gelatin interactions, increasing matrix durability.
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