AI Article Synopsis
- Heterogeneous catalysis occurs on surfaces, where reactants and products can quickly transition to liquid or gas forms.
- Self-assembled monolayers confine catalytic reactions to two dimensions, keeping the involved molecules on the surface.
- Surface-enhanced Raman spectroscopy is utilized to investigate these reactions and has shown that dimerization is a necessary step in the photocatalytic reduction of -nitrothiophenol.
Article Abstract
Heterogeneous catalysis is a surface phenomenon. Yet, though the catalysis itself takes place on surfaces, the reactants and products rapidly take the form of another physical state, as either a liquid or a gas. Catalytic reactions within a self-assembled monolayer are confined within two dimensions, as the molecules involved do not leave the surface. Surface-enhanced Raman spectroscopy is an ideal technique to probe these self-assembled monolayers as it gives molecular information in a measured volume limited to the surface. We show how surface-enhanced Raman spectroscopy can be used to determine the reaction kinetics of a two-dimensional reaction. As a proof of principle, we study the photocatalytic reduction of -nitrothiophenol. A study of the reaction rate and dilution effects leads to the conclusion that a dimerization must take place as one of the reaction steps.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4834625 | PMC |
| http://dx.doi.org/10.1002/cctc.201402647 | DOI Listing |
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