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 |
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Pages (from-to) | 1890-1895 |
Number of pages | 6 |
Journal | Journal of Physical Chemistry |
Volume | 95 |
Issue number | 5 |
DOIs | |
State | Published - 1991 |