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0211U001502,
0108U001442
,
A physical and chemical precision investigation of ion-molecular proton-contained systems, which are perspective for liquid-phase materials creation
Viktor I. Bulavin,
09-02-2011
The Kharkov state polytechnical university
Objects of research are HBr, HI, Bu4NBr and С6Н5СООН solutions in normal alcohols from methanol to nonanol over a wide temperature range. The work purpose is creation of the sample of laboratory thermostat with ±0.01K error and using this equipment in experiment. Equilibrium (association, solvation) and transport (conductance) properties of electrolytes mentioned above in n-alcohols at 238,15 - 328,15 K has been investigated. Influence of interparticle interactions on physical and chemical properties of these non-aqueous solutions have been revealed in aspect of temperature change and solvent nature. Research methods: electrical conductivity, e.m.f. measurements, UV-spectroscopy. Thermodynamic characteristics of process of solvation НBr in n-heptanol that n-octanol are calculated at 248,15 - 328,15 K using standard e.m.f. for element Pt (H2) HBr | AgBr, Ag. Experimental conductance data for investigated electrolytes are analyzed using modern conductivity theories. Constants of association (and its thermodynamic parameters), also as limiting molar conductivities are calculated from concentration dependence of conductance. It is shown, that free Gibbs energy (mainly defined by enthalpy part) of association increases with temperature and alcohol molar mass. UV-spectra of solutions С6Н5СООН in methanol, ethanol, water and water-ethanol mixture are received. It is shown, that with increase wave numbers and reduction of molar weight of alcohol maxima of extinction increases. Ab initio calculations of HBr solvation process, proton and bromide-ion in methanol and ethanol with number of molecules of alcohol from 1 to 4 in high basis 6-31++G* has been carried out. The obtained data correlate with earlier experimental results we received.
Крамаренко Андрій Вікторович
Соломатина Олексанра Миколаївна
Тульський Генадій Георгійович
2020-04-02
Updated: 2025-12-09
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