13C Dipolar NMR Study of Benzene Chemisorbed on High-Surface Alumina-Supported Platinum
| Autor: | Cecil Dybowski, R. E. De Souza, M. Engelsberg, M. A. Jacintha, C. S. Yannoni |
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| Rok vydání: | 1994 |
| Předmět: |
Stereochemistry
General Engineering chemistry.chemical_element Nuclear magnetic resonance spectroscopy Atmospheric temperature range Catalysis Condensed Matter::Materials Science Dipole chemistry.chemical_compound chemistry Molecule Physical chemistry Crystallite Physics::Chemical Physics Physical and Theoretical Chemistry Platinum Benzene |
| Zdroj: | The Journal of Physical Chemistry. 98:2397-2402 |
| ISSN: | 1541-5740 0022-3654 |
| Popis: | NMR spectroscopy of dipole-coupled pairs of 13 C nuclei is employed to probe the molecular structure and dynamics of benzene molecules chemisorbed on a Pt/η-Al 2 O 3 catalyst. A modified Carr-Purcell sequence, which suppresses inhomogeneous broadening, permits good spectral resolution over a broad temperature range. A comparison between spectral data and computer simulations indicates more than one type of site for the chemisorbed molecules. The molecular structure appears to be indistinguishable from that in polycrystalline benzene but with a vastly different motional behavior |
| Databáze: | OpenAIRE |
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