M. A. Czarnecki
Jun 16, 2000
Citations
1
Influential Citations
42
Citations
Journal
Journal of Physical Chemistry A
Abstract
Temperature- and concentration-dependent variations in self-association of octan-1-ol were studied by two-dimensional (2D) Fourier transform near-infrared (NIR) correlation spectroscopy. The obtained results suggest a similar mechanism of the thermal dissociation of hydrogen-bonded species for octan-1-ol and other straight chain alcohols (butan-1-ol, decan-1-ol). However, the extent of self-association in neat butan-1-ol seems higher than that for longer chain alcohols (octan-1-ol, decan-1-ol) under the same experimental conditions. At low and moderate concentrations of octan-1-ol in CCl4 the dimers are open, while in the pure liquid alcohol one can find some cyclic dimers. In both phases the cyclic aggregates dominate and the amount of the linear species is negligible. The population of the free OH groups increases with temperature, reaching 13% at 80 °C, and this increase occurs faster at elevated temperatures. The synchronous peak near 6600 cm-1 is shown to be a part of the broad polymer band, whereas ...