Infrared Spectroscopy of Liquid Water-N, N-dimethylformamide Mixtures (CROSBI ID 545259)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Biliškov, Nikola ; Baranović, Goran
engleski
Infrared Spectroscopy of Liquid Water-N, N-dimethylformamide Mixtures
The imaginary molar polarisability spectra of mixtures of water with N, N-dimethylformamide (DMF) over the entire composition range (0 < x < 1) at 25°C were obtained between 4000 and 700 cm^-1 by use of calibrated multiple reflection attenuated total reflection (ATR) technique. The composition dependent molar fractions of water bonded and DMF bonded OH groups, together with water bonded and free carbonyl groups, were determined from the integral intensities COH, CCO, CNCO, the areas under the nu(OH) and nu(C=O) bands, respectively, in the molar polarisability spectra. The obtained results are compared with thermodynamic properties of the system, and with results of molecular dynamics simulations. Behaviour of molar fraction of OH species indicates presence of stable aggregates of H2O molecules over the large composition interval, 0.2 < xDMF < 0.9. Aggregates of DMF, in which methyl groups are placed apart from surrounding water, are established in the interval xDMF < 0.2. For higher xDMF, DMF molecules orient in random orientation, giving rise to dipole-dipole pairs. Only in the interval xDMF > 0.9 water is dispersed into small clusters of water surrounded by DMF molecules.
Amide; DMF; Water; FTIR; ATR; Optical Constants
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Podaci o prilogu
19-19.
2008.
objavljeno
Podaci o matičnoj publikaciji
EUCMOS 2008. - Book of Abstracts
Musić, Svetozar ; Ristić, Mira ; Krehula, Stjepko
Zagreb:
978-953-6690-76-3
Podaci o skupu
European Congress on Molecular Spectroscopy
predavanje
31.08.2008-05.09.2008
Opatija, Hrvatska