title: Variable Temperature Infrared Spectroscopy Investigation of Benzoic Acid Interactions with Montmorillonite Clay Interlayer Water.
abstract: Molecular interactions between benzoic acid and cations and water contained in montmorillonite clay interlayer spaces are characterized by using variable temperature diffuse reflection infrared Fourier transform spectroscopy (VT-DRIFTS). Using sample perturbation and difference spectroscopy, infrared spectral changes resulting from removal of interlayer water and associated changes in local benzoic acid environments are identified. Difference spectra features can be correlated with changes in specific molecular vibrations that are characteristic of benzoic acid molecular orientation. Results suggest that the carboxylic acid functionality of benzoic acid interacts with interlayer cations through a bridging water molecule and that this interaction is affected by the nature of the cation present in the clay interlayer space.
authors.affiliation: University of Oklahoma, Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, 101 Stephenson Parkway, Norman, OK 73019 USA.
authors.forename: Tara M
authors.initials: TM
authors.lastname: Nickels
authors.forename: Audrey L
authors.initials: AL
authors.lastname: Ingram
authors.forename: Dalia K
authors.initials: DK
authors.lastname: Maraoulaite
authors.forename: Robert L
authors.initials: RL
authors.lastname: White
mesh_terms: D001546:Bentonite / Q000737:chemistry*; D019817:Benzoic Acid / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D002412:Cations; D014867:Water; D001546:Bentonite; D019817:Benzoic Acid