| Autor: |
Zhidomirov, G. M., Shubin, A. A., Kazansky, V. B., Van Santen, R. A. |
| Předmět: |
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| Zdroj: |
International Journal of Quantum Chemistry; 2004, Vol. 100 Issue 4, p489-494, 6p |
| Abstrakt: |
It is suggested that the abnormal methane IR frequency shift observed in ZnZSM‐5 zeolites is caused by adsorptive interaction of CH4 with particularly strong Zn2+ Lewis sites. Various molecular structures of zinc ion species in high‐silica zeolites are discussed, and it is concluded that increased Lewis acidity of a site is associated with decreased structural stability. It is shown that Zn2+ in zeolite cationic position with distantly placed A1 ions can produce observed shift of vibrational frequencies for adsorbed methane molecule. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004 [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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