6 July 1998 Fluorescence detection and electrochemistry in hybrid zirconia xerogels including chromophores or electroactive species
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Abstract
New organic-inorganic sol-gel films have been prepared starting from mixtures of silicon and zirconium alkoxides or pure zirconium alkoxides and deposited on metallic substrates. Coatings loaded with a fluorescent SrF2:Y2+ powder have been deposited on stainless steel rendered adhesive by a special oxidative surface treatment. The final deposits have successfully supported drastic adherence standard tests after several dips into liquid nitrogen, and have been used for temperature dependant fluorescence decay measurement. The fluorescent gels have been coated on a rotating cylinder into liquid nitrogen and the fluorescence decay measurement device is described, as well as the optical device used for the light analysis. Efficient measures can be registered at rotating speeds as fast as 3000 rpm. On the other hand, xerogels issued from pure zirconium propoxide have been functionalized with electroactive ferrocenes bonded to acatylacatone or salicylate moieties. All ferrocenes included into the gels can be electrochemically reversibly oxidized and reduced. Efficient modified electrodes can be built, whose behavior is in perfect accordance with the theoretical prediction in the case of an homogeneous repartition of the redox species inside the film.
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Pierre Audebert, Pierre Audebert, H. Cattey, H. Cattey, F. Bresson, F. Bresson, Gilbert M. Tribillon, Gilbert M. Tribillon, } "Fluorescence detection and electrochemistry in hybrid zirconia xerogels including chromophores or electroactive species", Proc. SPIE 3469, Organic-Inorganic Hybrid Materials for Photonics, (6 July 1998); doi: 10.1117/12.312921; https://doi.org/10.1117/12.312921
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