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Effect of lattice-gas atoms on the adsorption behaviour of thioether molecules

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21940

Pan,  Yi
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22266

Yang,  Bing
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21916

Nilius,  Niklas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21524

Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

c2cp41081h.pdf
(Publisher version), 3MB

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Citation

Pan, Y., Yang, B., Hulot, C., Blechert, S., Nilius, N., & Freund, H.-J. (2012). Effect of lattice-gas atoms on the adsorption behaviour of thioether molecules. Physical Chemistry Chemical Physics, 14(31), 10987-10993. doi:10.1039/c2cp41081h.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-227A-7
Abstract
Using STM topographic imaging and spectroscopy, we have investigated the adsorption of two thioether molecules, 1,2-bis(phenylthio)benzene and (bis(3-phenylthio)-phenyl)sulfane, on noble and transition metal surfaces. The two substrates show nearly antipodal behaviour. Whereas complexes with one or two protruding centres are observed on Au(111), only flat and uniform ad-structures are found on NiAl(110). The difference is ascribed to the possibility of the thioethers to form metal–organic complexes by coordinating lattice-gas atoms on the Au(111), while only the pristine molecules adsorb on the alloy surface. The metal coordination in the first case is driven by the formation of strong Au–S bonds and enables the formation of characteristic monomer, dimer and chain-like structures of the thioethers, using the Au atoms as linkers. A similar mechanism is not available on the NiAl, because no lattice gas develops at this surface at room temperature. Our work demonstrates how surface properties, i.e. the availability of mobile ad-species, determine the interaction of organic molecules with metallic substrates.