Long‐Distance Rate Acceleration by Bulk Gold |
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Authors: | Alexander Schlimm Roland Lw Talina Rusch Fynn Rhricht Thomas Strunskus Tobias Tellkamp Frank Snnichsen Uwe Manthe Olaf Magnussen Felix Tuczek Rainer Herges |
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Institution: | Alexander Schlimm,Roland Löw,Talina Rusch,Fynn Röhricht,Thomas Strunskus,Tobias Tellkamp,Frank Sönnichsen,Uwe Manthe,Olaf Magnussen,Felix Tuczek,Rainer Herges |
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Abstract: | We report on a very unusual case of surface catalysis involving azobenzenes in contact with a Au(111) surface. A rate acceleration of the cis–trans isomerization on gold up to a factor of 1300 compared to solution is observed. By using carefully designed molecular frameworks, the electronic coupling to the surface can be systematically tuned. The isomerization kinetics of molecules with very weak coupling to the metal is similar to that found in solution. For their counterparts with strong coupling, the relaxation rate is shown to depend on the spin‐density distribution in the triplet states of the molecules. This suggests that an intersystem crossing is involved in the relaxation process. Aside from their impact on catalytic processes, these effects could be used to trigger reactions over long distances. |
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Keywords: | Azobenzol Katalyse Oberflä chenspektroskopie Schwingungsspektroskopie Selbstorganisation |
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