Author(s)

Thomas Onfroy^1,2*, Olivier Marie¹

¹Laboratoire Catalyse et Spectrochimie, Normandie Université/UNICAEN/ENSICAEN/CNRS, Caen, France.
²Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, Campus Pierre et Marie-Curie, Paris, France.

The integrated molar absorption coefficients for ν(OH) (3655 cm^-1), δ(OH) (Q branch at 1176 cm^-1 or whole bands), [ν(CCring) + δ(OH)] (Q branch at 1344 cm^-1 or whole bands) and γ(CH) (752 cm^-1) were determined at 342 K, by recording infrared spectra of pure gaseous phenol at different partial pressure (from 0 to 33 Pa). The integrated molar absorption coefficients (ε) values were obtained with a good reproducibility and the relative uncertainty on the given values is below 2%. The influence of water on the integrated molar absorption coefficients of phenol has been investigated in a large range of n_water/n_phenol values (from 0.5 to 6.1 and from 44 to 94) using distinct setups. The infrared spectra of a gas mixture containing a constant amount of phenol and different amount of water were recorded (closed cell) whereas in dynamic condition (under flow) the water partial pressure was kept constant at 1.3 kPa and the phenol partial pressure was increased from 0 to 30 Pa. It is here demonstrated that, at 342 or 355 K, the presence of water does not affect the epsilon values of δ(OH) and [ν(CC_ring) + δ(OH)] bands.

Phenol Gas, Integrated Molar Absorption Coefficients Determination, IR Spectroscopy, Phenol-Water Interaction, Phenol Gas Quantification

Onfroy, T. and Marie, O. (2019) Determination of Integrated Molar Absorption Coefficients for Gaseous Phenol Infrared Bands and Influence of Water Vapor on Their Values. American Journal of Analytical Chemistry, 10, 9-22. doi: 10.4236/ajac.2019.101002.