Abstract
The diffusivity and reactivity of Ru(bpy)2+ 3 and Co(bpy)2+ 3 trapped within organically modified silicate (ORMOSIL) monoliths have been studied using electrogenerated chemiluminescence, voltammetry, and amperometry. For gel-encapsulated Ru(bpy)2+ 3-tripropylamine, the shape and intensity of the luminescence-voltage curve was highly dependent on the amount of organoalkoxysilane introduced into the matrix. Likewise, for gel-encapsulated Co(bpy)2+ 3, the magnitude of the diffusion coefficient and its rate of change with drying was also dependent on the organic modifier in the gel. A comparison of the results to those obtained with the gels prepared solely from tetramethoxysilane revealed enhanced diffusivity and reactivity of the reagents encapsulated in the ORMOSIL matrix.
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Collinson, M.M., Novak, B. Diffusion and Reactivity of Ruthenium (II) Tris(bipyridine) and Cobalt (II) Tris(bipyridine) in Organically Modified Silicates. Journal of Sol-Gel Science and Technology 23, 215–220 (2002). https://doi.org/10.1023/A:1013966629311
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DOI: https://doi.org/10.1023/A:1013966629311