A theory for time-resolved photothermal spectroscopy is proposed for in situ determination of reaction and phase transformation kinetics and mechanisms in condensed media. The theory is developed from the thermal diffusion equation for thin slabs of materials with a finite optical
absorption coefficient undergoing a first-order process. The ratio of the photo-response to the total thermal response is evaluated for various reaction kinetics, and a series of time-resolved spectra is constructed.
Department of Chemistry, Arizona State University, Tempe, Arizona 85287-1604
Publication date: September 1, 1989
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