The photoacoustic (PA) signal enhancement of an infrared-active mode of the adsorbed pyridine in the channel/cage of zeolites HZSM-5 and HY was studied comparatively with the use of photoacoustic, transmittance, and diffuse reflectance FT-IR spectroscopies. The data indicate that the
PA enhancements of an infrared band of the adsorbed pyridine in the channel/cage of HY and HZSM-5 are 2.1 and 3.3, respectively. The importance of interstitial gas expansion in the photoacoustic signal enhancement of the surface infrared mode is discussed.
Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 2:
Center for Micro Analysis and Reaction Chemistry, University of Utah, Salt Lake City, Utah 84112
Publication date: June 1, 1991
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