Abstract
Recently we have extended to heterogeneous, opaque and often highly scattering systems the advantages of being able to subject them to flash photolysis investigation by using diffuse reflected light instead of transmitted light as the analysing source. Laser induced transient spectra and decay kinetics have been observed on timescales extending from several seconds to picoseconds from a wide variety of samples. These include fractions of monolayers of organic molecules adsorbed on catalytic metal oxide surfaces, and included within the hydrophobic man-made zeolite silicalite, from semiconductor powders and sintered porous electrodes doped and undoped, from organic and inorganic microcrystals, and from dyes adsorbed on fabrics and chemically bound to polymers. Experimental details are reviewed in brief as are some typical experimental results. The potential of the technique to study elementary reactions at interfaces is demonstrated with particular reference to bimolecular reactions of the triplet state of acridine adsorbed on various porous silica surfaces.
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Wilkinson, F., Leicester, P.A., Kelly, G.P., Oelkrug, D., Gregor, M. (1989). The Study of Elementary Reactions at Interfaces Using Diffuse Reflectance Laser Flash Photolysis. In: Knoche, W., Schomäcker, R. (eds) Reactions in Compartmentalized Liquids. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74787-8_15
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DOI: https://doi.org/10.1007/978-3-642-74787-8_15
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