Monolayers of 1-Alkynes on the H-Terminated Si(100) surface
| Autor: | Ernst J. R. Sudhölter, Geert Meijer, Frank J. Vergeldt, Michael G. Schoeman, Huub Maas, A.B. Sieval, Han Zuilhof,† and, Ricarda Opitz |
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| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Surface (mathematics) Organic Chemistry Infrared spectroscopy Surfaces and Interfaces Condensed Matter Physics Organic compound Reflectivity Organische Chemie Contact angle Crystallography chemistry Covalent bond Monolayer Electrochemistry Life Science Molecule General Materials Science Spectroscopy |
| Zdroj: | Langmuir, 16(26), 10359-10368 Langmuir 16 (2000) 26 |
| ISSN: | 0743-7463 |
| Popis: | Monolayers of a series of 1-alkynes, from 1-dodecyne to 1-octadecyne, have been prepared on the hydrogen-terminated Si(100) surface via a thermal reaction of the organic compound with this Si surface. An efficient procedure is presented for the synthesis of 1-alkynes from the corresponding 1-alkenes. The resulting monolayers were characterized by water contact angle measurements, ATR infrared spectroscopy, and X-ray reflectivity. The results show that these 1-alkynes give well-ordered, covalently bonded monolayers, which are at least as ordered as those of the corresponding 1-alkenes. The exact binding geometry of the 1-alkyne to the Si surface was investigated. The results from IR spectroscopy and X-ray reflectivity measurements indicate that the 1-alkynes form two Si-C bonds to the surface per reacting molecule. Quantum mechanical calculations confirm that this formation of two Si-C bonds is not only chemically possible but also energetically much more favorable than formation of only one Si-C bond per reacting molecule. |
| Databáze: | OpenAIRE |
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