Comparative IR and H-1-MAS NMR study of adsorption of CD3CN on zeolite H-beta: evidence of the presence of two families of bridged Bronsted sites

Authors
Paze, C Zecchina, A Spera, S Cosma, A Merlo, E Spano, G Girotti, G
Citation
C. Paze et al., Comparative IR and H-1-MAS NMR study of adsorption of CD3CN on zeolite H-beta: evidence of the presence of two families of bridged Bronsted sites, PCCP PHYS C, 1(10), 1999, pp. 2627-2629
Citations number
15
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
PCCP PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN journal
14639076 → ACNP
Volume
1
Issue
10
Year of publication
1999
Pages
2627 - 2629
Database
ISI
SICI code
1463-9076(19990515)1:10<2627:CIAHNS>2.0.ZU;2-E
Abstract
The IR and H-1-MAS NMR spectroscopy of zeolite H-beta in interaction with C D3CN is described, Two families of strong Si(OH)AI Bronsted sites have been clearly distinguished: a first family, characterized by an NMR signal at 4 .4 ppm and an IR peak at 3614 cm(-1) (isolated bridged hydroxys) and a seco nd family, characterized by a broad band in the 3-7 ppm NMR range and in th e 3600-3200 cm(-1) IR range, due to bridged hydroxys which are perturbed by H-bond interactions with the zeolitic framework. This last family of hydro xys form weaker adducts with acetonitrile.