Surface reactivities of polynuclear aromatic adsorbates on alumina and silica particles using infrared photoacoustic spectroscopy

Article abstract of DOI:10.1021/ac00281a022

Infrared photoacoustic spectra were obtained from organic films on inorganic particulate adsorbents. Under favorable conditions, including strong adsorption bands and high surface area silica and alumina substrates, the detection sensitivity of photoacoustic spectroscopy is estimated to be 0. 2 monolayers of an adsorbed organic compound. Because of the molecular information provided by IR spectroscopy, reactions of adsorbed organic compounds may be examined in situ. Examples shown involve photochemical reactions of sorbed polynuclear aromatic compounds that are potentially important in the atmospheric chemistry of combustion generated aerosols.