The gravimetric estimation of CO2-evolved, FT-IR monitoring of the rate of formation of surface species, as well as several other measurements during the n-hexane soot/ozone reaction, has led to the conclusion that soot is a layered structure whose layers are chemically bonded, unlike the graphite structure where the layers are ordered by van der Waals forces. Fourier transform infrared spectroscopy, electrochemical analysis, microgravimetry, scanning electron microscopy (SEM), and the classical BET surface area determination technique have been employed in this work.

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Ultraviolet radiation in the regions 266 < X < 400 nm and 250 < X < 400 nm has been employed to study the oxidative photodegradation pathways for silver-backed polyacrylonitrile film. Measurements based on Fourier transform infrared reflection absorbance (FTIR-RA) spectroscopy were supported by electron paramagnetic resonance (EPR) studies. Isotopic 13CN PAN was used to confirm some photodegradation products. Upon irradiation at wavelengths below 266 nm the polymer turns yellowish-brown and also increases in electrical conductivity, suggesting the presence of a chromophore system of the type (>C=N-)".

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