VARIABLE-TEMPERATURE C-13 MAGIC-ANGLE-SPINNING NUCLEAR-MAGNETIC-RESONANCE INVESTIGATIONS ON THE INTERACTION BETWEEN LEWIS-ACID SITES AND CARBON-MONOXIDE IN H-ZSM-5 ZEOLITES

Authors
ZSCHERPEL D BRUNNER E KOCH M PFEIFER H
Citation
D. Zscherpel et al., VARIABLE-TEMPERATURE C-13 MAGIC-ANGLE-SPINNING NUCLEAR-MAGNETIC-RESONANCE INVESTIGATIONS ON THE INTERACTION BETWEEN LEWIS-ACID SITES AND CARBON-MONOXIDE IN H-ZSM-5 ZEOLITES, Microporous materials, 4(2-3), 1995, pp. 141-147
Citations number
39
Categorie Soggetti
Chemistry Physical","Material Science","Chemistry Applied
Journal title
Microporous materials → ACNP
ISSN journal
09276513
Volume
4
Issue
2-3
Year of publication
1995
Pages
141 - 147
Database
ISI
SICI code
0927-6513(1995)4:2-3<141:VCMN>2.0.ZU;2-E
Abstract
C-13 Magic-angle spinning nuclear magnetic resonance (MAS NMR) spectro scopic measurements were carried out in order to investigate the inter action between Lewis acid sites in H-ZSM-5 and adsorbed carbon monoxid e. A new measure for the ''overall'' Lewis acidity of zeolites could b e derived from the C-13 MAS NMR spectroscopic data. Further, the chemi cal shift of CO adsorbed on Bronsted acid sites and physisorbed CO cou ld be determined to amount to delta(B) = 178 ppm and delta(P) = 186 pp m, respectively.