8 research outputs found
The Role of Fermi Resonance in Formation of Valence Band of Water Raman Scattering The role of Fermi resonance in formation of valence band of water Raman scattering was investigated. Simultaneous measurement of characteristics of bending and valence band
No full textВлияние самоорганизации амфифильных соединений на вклад резонанса Ферми в формирование валентной полосы OH-групп
No full textThe role of Fermi resonance (FR) in the formation of the OH-groups Raman spectra stretch-
ing band of aqueous solutions of amphiphilic compounds with different lengths of hydrocarbon radicals:
ethanol and sodium octanoate, has been studied. The influence of amphiphile self-organization processes
on the FR contribution to the intensity of the OH stretching band of aqueous solutions was foundИсследована роль резонанса Ферми (РФ) в формировании валентной полосы OH-групп спектров комбинационного рассеяния (КР) водных растворов амфифильных соединений с
разной длиной углеводородных радикалов: этанола и октаноата натрия. Обнаружено влияние процессов самоорганизации амфифилов на вклад РФ в интенсивность валентной полосы ОН водных
растворов
Raman Spectroscopy of Water–Ethanol Solutions: The Estimation of Hydrogen Bonding Energy and the Appearance of Clathrate-like Structures in Solutions
No full textThe
structure of aqueous alcohol solutions at the molecular level
for many decades has remained an intriguing topic in numerous theoretical
and practical investigations. The aberrant thermodynamic properties
of water–alcohol mixtures are believed to be caused by the
differences in energy of hydrogen bonding between water–water,
alcohol–alcohol, and alcohol–water molecules. We present
the Raman scattering spectra of water, ethanol, and water–ethanol
solutions with 20 and 70 vol % of ethanol thoroughly measured and
analyzed at temperatures varying from −10 to +70 °C. Application
of the MCR-ALS method allowed for each spectrum to extract contributions
of molecules with different strengths of hydrogen bonding. The energy
(enthalpy) of formation/weakening of hydrogen bonds was calculated
using the slope of Van’t Hoff plot. The energy of hydrogen
bonding in 20 vol % of ethanol was found the highest among all the
samples. This finding further supports appearance of clathrate-like
structures in water–ethanol solutions with concentrations around
20 vol % of ethanol
A method for optical imaging and monitoring of the excretion of fluorescent nanocomposites from the body using artificial neural networks
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Monitor and Prediction of Near-Earth Radiation Environment in the Frame of Space Monitoring Data Center at Moscow State University
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