The laser thermal lens spectroscopy was used to analyze the thermal behavior of methanol, ethanol, and 1-propanol with CCl4 binary mixtures. Using this method, the values of thermal lens characteristic time, thermal diffusivity, thermal conductivity, thermo-optical parameters for three binary mixtures at 298.15 K and different volume fractions were measured experimentally. The effect of alcohol chain length on the experimental parameters and molecular interactions was discussed. Changes in the measured TL signals as a function of concentration indicate that these results originate from physical and molecular properties of liquid components. Calculated parameters were used to explain molecular forces among unlike molecules. Furthermore, the Soret coefficient ST for the stated binary mixtures was calculated. Findings demonstrate that increasing the chain length of alcohol enhances its tendency to interact with CCl4. Measured parameters for the pure materials with this technique are in good agreement with the scientific literature.
