A Model for Time-Resolved Photothermal Spectroscopy of Reactions in Condensed Media

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Abstract:

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.

Keywords: Photothermal spectroscopy; Spectroscopic techniques; Spectroscopy of solids; Time-resolved spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702894203660

Affiliations: Department of Chemistry, Arizona State University, Tempe, Arizona 85287-1604

Publication date: September 1, 1989

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