In-Situ Diffuse Reflectance Infrared Spectroscopic Study of the Photodecomposition of Dibenzyl Ketone Adsorbed on Zeolites

Article abstract of DOI:10.1021/j100402a034

The infrared spectra of 1,3-diphenyl-2-propanone (dibenzyl ketone, DBK) adsorbed on the hydrophobic zeolite Silicalite have been measured by diffuse reflectance techniques.These spectra are consident with the existence of several classes of adsorption/inclusion sites in the Silicalite framework; in accord with previous studies, two main classes of sites are discernible.The photodecomposition of included dibenzyl ketone was followed directly by in-situ UV photolysis.The formation of products can be followed directly from the infrared spectra.The results demonstrate that the photodecomposition of included DBK proceeds preferentially in one class of sites which are tentatively assigned to channel inclusion as opposed to surface adsorption sites.