Ultrasonic and IR study of molecular association process through hydrogen bonding in ternary liquid mixtures

Acoustic, volumetric, and spectroscopic studies of formamide with 2-alkoxyethanols at different temperatures

“…Also it is noted that the velocity of ultrasonic wave decreases with increase in temperature. The increase of thermal energy weakens the molecular forces which tend to decrease the ultrasonic velocity as expected, which is in agreement with the conclusions drawn in our previous work [19].…”

“…It is seen from Figure 5A to D that in the (FA + 2-ME) and (FA + 2-EE) systems the broadband appear at lower frequency compared to the broadband appear in the pure state of 2-ME and 2-EE. Thus, the study of infrared spectra shows that the presence of complex formation at x = 0.5726 and 0.5054 mole fractions of FA for the (FA + 2-ME) and (FA + 2-EE) systems, respectively, which is also indicated through minima of u E , Z E , and V E m as discussed earlier [19,20,31,32]. Thus, the pattern, position and intensity of the O-H band as per infrared data strongly support the conclusions drawn from the acoustic and volumetric study, that the molecular association through hydrogen bonding is maximum at those concentrations where minima of excess ultrasonic velocity and excess molar volume occurs.…”

“…The measured values of density (q) and ultrasonic velocity (u) were used to determine various physical parameters [19][20][21]:…”

Acoustic, volumetric and spectroscopic investigations in binary mixtures of formamide/N-methylformamide+2-chloroethanol at various temperatures

“…The measured values of density (ρ) and ultrasonic velocity (u) were used to conclude various parameters [21][22][23]:…”

Acoustic and volumetric properties of aqueous solution of levofloxacin nickel complexes at 308K

“…By ultrasonic measurements, the molecular interactions in pure liquids [1][2][3][4] , aqueous solution [5][6][7] and liquid mixtures [8][9][10][11] have also been studied. Iqbal et al 12 have studied the apparent molar volume and adiabatic compressibility of aqueous solutions of drugs such as sodium salicylate, methyl orange, L-tryptophan, phenol and hydrochloride salts of procaine and pilocarpene and ephedrine.…”