Abstract
It is suggested that the abnormal methane IR frequency shift obsd. in ZnZSM-5 zeolites is caused by adsorptive interaction of CH4 with particularly strong Zn2+ Lewis sites. Various mol. structures of zinc ion species in high-silica zeolites are discussed, and it is concluded that increased Lewis acidity of a site is assocd. with decreased structural stability. It is shown that Zn2+ in zeolite cationic position with distantly placed A1 ions can produce obsd. shift of vibrational frequencies for adsorbed methane mol. [on SciFinder (R)]
Original language | English |
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Pages (from-to) | 489-494 |
Number of pages | 6 |
Journal | International Journal of Quantum Chemistry |
Volume | 100 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2004 |