Entropy, the Silent Killer of Aromaticity of Adsorbed Pyridine on Si(100) and Ge(100)
| Autor: | Stéphane Carniato, G. Boureau, Romain Coustel |
|---|---|
| Přispěvatelé: | Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Heterocyclic-compounds
Inorganic chemistry Combustion 02 engineering and technology 010402 general chemistry Organic-molecules 01 natural sciences Organic molecules Si(001) chemistry.chemical_compound Adsorption Pyridine Physical and Theoretical Chemistry Nitrogen-compounds Liquid Ge(001) surfaces Chemistry business.industry Aromaticity [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Hydrocarbons 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Crystallography General Energy Semiconductor 0210 nano-technology business Chemical thermodynamic properties |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2014, 118 (31), pp.17505-17510. ⟨10.1021/jp500195r⟩ Journal of Physical Chemistry C, 2014, 118 (31), pp.17505-17510. ⟨10.1021/jp500195r⟩ |
| ISSN: | 1932-7447 1932-7455 |
| DOI: | 10.1021/jp500195r⟩ |
| Popis: | International audience; This paper studies the chemical attachment of pyridine on two semiconductor surfaces, Si(100) and Ge(100), at low coverages. We use thermodynamic arguments to show that the aromaticity of pyridine is preserved in both cases at low temperatures. At high temperatures, a transition toward nonaromatic structures-tetrapod structure for Si(100) and dipod structure for Ge(100)-occurs without cleavage of C-H bonds. We show that this transition can be explained by the tiny entropy increase associated with the disappearance of aromaticity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|