Synthesis and Luminescent Properties of Lu2O2SO4 : Eu3+ Spherical ParticlesRussian Journal of General Chemistry - Tập 93 - Trang 2071-2075 - 2023
K. A. Larionova, Yu. G. Denisenko, S. A. Osseni, O. V. Andreev, I. A. Razumkova
Potential use of Lu2O2SO4:xEu3+ as a contrast agent in multifunctional medical imaging was studied. Powders of Lu2O2SO4 : xEu3+ (x = 1–7 mol %) solid solutions consisting of spherical particles with a diameter of approximately 300 nm were synthesized by co-precipitation followed by calcination. The duration of synthesis influences the particle morsphology: increase in the coprecipitation duration ...... hiện toàn bộ
Thermodynamic properties of silicate glasses and melts: VII. System MgO-B2O3-SiO2Russian Journal of General Chemistry - Tập 80 - Trang 2405-2413 - 2011
V. L. Stolyarova, S. I. Lopatin, S. M. Shugurov, A. L. Shilov
Processes of evaporation and thermodynamic properties of glasses and melts of the system MgO-B2O3-SiO2 in the range of 1550–1800 K were studied for the first time by high-temperature mass-spectrometry. The resulting activities and Gibbs energies of components and also corresponding excess values point to negative deviations from ideal behavior and to the absence of immiscibility fields in glasses ...... hiện toàn bộ
Quantum-chemical simulation of the synthesis of structural fragments of humic substances analogsRussian Journal of General Chemistry - Tập 84 - Trang 848-852 - 2014
M. A. Poshelyuzhnaya, V. A. Litvin, R. L. Galagan, B. F. Minaev
Semiempirical calculations by the PM3 method were used to optimize the structural fragments of the precursors of synthetic humic and fulvic acids. Changes in the thermodynamic parameters (enthalpy of formation, entropy, and Gibbs energy) were determined and a conclusion was drowm if the postulated processes are thermodynamically possible.
Features of Complex Formation of Native and Polymeric β-Cyclodextrins with SulfasalazineRussian Journal of General Chemistry - Tập 93 - Trang 1130-1137 - 2023
M. A. Agafonov, I. V Terekhova
The complex formation of sulfasalazine with native and polymeric β-cyclodextrins in buffer solutions with a physiological pH value was studied using isothermal saturation and 1H NMR methods. It was found that sulfasalazine forms two types of complexes in reactions with above cyclodextrins, but only the formation of inclusion complexes determines the observed increase in drug solubility, which is m...... hiện toàn bộ