Study of excess thermodynamic properties of binary systems containing cinnamaldehyde with alcohols supported by ATR-FTIR spectral studies

Abstract

Abstract The thermophysical behavior of the binary mixtures trans-cinnamaldehyde (CA) with alcohols namely, methanol (MO), ethanol (EO), propanol (PO), isopropanol (IPO) has been studied through the measurement of density (ρ), speed of sound (u), over the entire mole fraction range at T = (298.15, 303.15, 308.15, 313.15) K under atmospheric pressure. Excess volume (VE) and excess isentropic compressibilities ( κ S E ) were also calculated and correlated with Redlich–Kister equation. Except for CA with MO and EO, the remaining investigated systems exhibit positive values of VE and all the four systems exhibit negative κ S E values over the entire composition range. Moreover, all the systems behave differently when the temperature is raised. Besides, ATR-FTIR spectroscopy is used for finding molecular interactions in component molecules.