Mixing dynamics of diethyl ether and chloroform

Mixing dynamics of liquid diethyl ether and chloroform were studied by time-resolved Fourier-transform infrared absorption spectroscopy in attenuated total reflectance mode (ATR-FTIR). An in situ experiment where chemicals were mixing in the vertical cell directly attached to the diamond ATR accessory was carried out. The data were analyzed by two-dimensional correlation spectroscopy (2D COS) and multivariate curve resolution (MCR). The analysis of ATR-FTIR spectra has shown that each species (diethyl ether and chloroform) exist in an unbound (free) state and bound state (as a part of the molecular complex). The concentration and spectral profiles of mixture components were obtained using MCR decomposition. A theory of nonlinear diffusion has been used to model the experimentally obtained concentration profiles. It has been shown that the theoretical concentration profiles are in good qualitative agreement with experimental ones. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The mixing dynamics of liquid diethyl ether and chloroform were studied using time-resolved Fourier-transform infrared absorption spectroscopy in ATR mode. The data were analyzed using 2D COS and MCR, showing the existence of different species in unbound and bound states. The concentration profiles obtained through MCR decomposition were in good agreement with theoretical profiles based on a theory of nonlinear diffusion.