Halogen-Substituted Thiophenol Molecules on Cu(111)
| Autor: | and Anwei Liu, Ludwig Bartels, Greg Pawin, Kin L. Wong, Bommisetty V. Rao, Xing Lin, Sergey Stolbov, Ki-Young Kwon, Talat S. Rahman |
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| Rok vydání: | 2004 |
| Předmět: |
Models
Molecular Surface Properties Stereochemistry Substituent Substrate (electronics) Ring (chemistry) Sensitivity and Specificity Electronegativity chemistry.chemical_compound Halogens Phenols Microscopy Scanning Tunneling Monolayer Electrochemistry Molecule General Materials Science Sulfhydryl Compounds Particle Size Spectroscopy Chemistry Thiophenol Temperature Surfaces and Interfaces Condensed Matter Physics Crystallography Halogen Adsorption Copper |
| Zdroj: | Langmuir. 20:10928-10934 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Para-halosubstituted thiophenols (X-TPs, where X is Br, Cl, or F) form ordered islands and monolayers on Cu(111) at temperatures as low as 81 K. At incomplete coverages, all X-TPs adsorb with the dehydrogenated thiol group attached to the substrate and the substituted ring inclined toward the surface, as verified experimentally and theoretically. The structure of ordered islands has a pronounced dependence on the nature of the halogen substituent: while unsubstituted TP and pentafluoro-TP molecules do not self-assemble into extended ordered patterns at 81 K, X-TP molecules form a range of different structures which depend both on the size and electronegativity of the substituent, as well as on the coverage. |
| Databáze: | OpenAIRE |
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