Low-temperature13C NMR investigations on carbon monoxide hydrogen bonded to Brønsted acid sites in HY zeolites
| Autor: | Eike Brunner, M. Koch, Harry Pfeifer, D. Zscherpel |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Hydrogen
Hydrogen bond Chemistry Carbon-13 NMR satellite Inorganic chemistry General Physics and Astronomy chemistry.chemical_element Carbon-13 NMR chemistry.chemical_compound Heteronuclear molecule Physical chemistry Molecule Physical and Theoretical Chemistry Brønsted–Lowry acid–base theory Carbon monoxide |
| Zdroj: | Chemical Physics Letters. 228:501-505 |
| ISSN: | 0009-2614 |
| Popis: | 13 C NMR investigations were carried out at 4.5 K in order to analyze the lineshape of the solid-state spectrum of 13 CO adsorbed on Bronsted acid sites in H Y zeolites. The spectrum was found to be dominated by the chemical shift anisotropy and by the heteronuclear magnetic dipolar interaction between the 13 C nucleus of the 13 CO molecule and the proton of the Bronsted acid site where the molecule is adsorbed. Therefore, an analysis of the lineshape of the low-temperature 13 C NMR spectrum allows a precise determination of the hydrogen bond distance r H C between these nuclei. A value of r H C =0.21±0.01 nm has been obtained by this method which is in excellent agreement with recent quantum chemical calculations. |
| Databáze: | OpenAIRE |
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