Diffusion-limited reactions at solid-liquid interfaces: Effects of surface geometry

Joshua Samuel; Michael Ottolenghi; David Avnir

doi:10.1021/j100158a004

Diffusion-limited reactions at solid-liquid interfaces: Effects of surface geometry

Joshua Samuel
, Michael Ottolenghi^*
, David Avnir

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The diffusion-controlled reaction between a molecule (excited Ru(bpy)₃²⁺) adsorbed at the irregular surface of porous silicas and a reactant (anthracene) diffusing from an intrapore liquid phase was studied by nanosecond laser excitation. It was found that the reaction is controlled by the short-range irregularity of the surface but not by the average pore diameter (in the 40-1000-Å range). It is suggested that the chemical reactivity correlates with the fractal dimension of the surface accessible for adsorption.

Original language	English
Pages (from-to)	1890-1895
Number of pages	6
Journal	Journal of Physical Chemistry
Volume	95
Issue number	5
DOIs	https://doi.org/10.1021/j100158a004
State	Published - 1991

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abstract = "The diffusion-controlled reaction between a molecule (excited Ru(bpy)32+) adsorbed at the irregular surface of porous silicas and a reactant (anthracene) diffusing from an intrapore liquid phase was studied by nanosecond laser excitation. It was found that the reaction is controlled by the short-range irregularity of the surface but not by the average pore diameter (in the 40-1000-{\AA} range). It is suggested that the chemical reactivity correlates with the fractal dimension of the surface accessible for adsorption.",

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AU - Avnir, David

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N2 - The diffusion-controlled reaction between a molecule (excited Ru(bpy)32+) adsorbed at the irregular surface of porous silicas and a reactant (anthracene) diffusing from an intrapore liquid phase was studied by nanosecond laser excitation. It was found that the reaction is controlled by the short-range irregularity of the surface but not by the average pore diameter (in the 40-1000-Å range). It is suggested that the chemical reactivity correlates with the fractal dimension of the surface accessible for adsorption.

AB - The diffusion-controlled reaction between a molecule (excited Ru(bpy)32+) adsorbed at the irregular surface of porous silicas and a reactant (anthracene) diffusing from an intrapore liquid phase was studied by nanosecond laser excitation. It was found that the reaction is controlled by the short-range irregularity of the surface but not by the average pore diameter (in the 40-1000-Å range). It is suggested that the chemical reactivity correlates with the fractal dimension of the surface accessible for adsorption.

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Diffusion-limited reactions at solid-liquid interfaces: Effects of surface geometry

Abstract

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