AI Article Synopsis
- Many metal complexes act as catalysts in chemical reactions, making it important to understand their mechanisms for developing new catalysts.
- Traditional spectroscopic methods study reactions at a general level, but recent advancements like fluorescence microscopy and scanning tunneling microscopy (STM) allow for detailed observations at the atomic level during reactions.
- This study utilizes STM to image oxidation catalysis with manganese porphyrin catalysts in real time at a liquid-solid interface, revealing that oxygen atoms from O2 bind to nearby catalysts before they attach to the substrate.
Article Abstract
Many chemical reactions are catalysed by metal complexes, and insight into their mechanisms is essential for the design of future catalysts. A variety of conventional spectroscopic techniques are available for the study of reaction mechanisms at the ensemble level, and, only recently, fluorescence microscopy techniques have been applied to monitor single chemical reactions carried out on crystal faces and by enzymes. With scanning tunnelling microscopy (STM) it has become possible to obtain, during chemical reactions, spatial information at the atomic level. The majority of these STM studies have been carried out under ultrahigh vacuum, far removed from conditions encountered in laboratory processes. Here we report the single-molecule imaging of oxidation catalysis by monitoring, with STM, individual manganese porphyrin catalysts, in real time, at a liquid-solid interface. It is found that the oxygen atoms from an O2 molecule are bound to adjacent porphyrin catalysts on the surface before their incorporation into an alkene substrate.
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| http://dx.doi.org/10.1038/nnano.2007.106 | DOI Listing |
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