Low-temperature 1H MAS NMR and FTIR investigations on the interaction of tetrachloroethylene with surface hydroxyl groups in H-zeolites

Autor:	Eike Brunner, M. Koch, Harry Pfeifer, H. Sachsenröder, B. Staudte
Rok vydání:	1996
Předmět:	Chemistry General Engineering Analytical chemistry Infrared spectroscopy General Chemistry Molecular sieve Adsorption Deprotonation Proton NMR Physical chemistry Molecule General Materials Science Fourier transform infrared spectroscopy Zeolite
Zdroj:	Microporous Materials. 6:341-347
ISSN:	0927-6513
Popis:	The interaction of surface hydroxyl groups in zeolites with adsorbed C 2 Cl 4 molecules was investigated by lowtemperature 1 H MAS NMR and FTIR spectroscopy. It could be shown that the induced 1 H NMR chemical shift Δδ of free surface hydroxyl groups caused by the adsorption of C 2 Cl 4 reflects the strength of acidity of the hydroxyl groups. A linear correlation between Δδ and the induced wavenumber shift Δν of the stretching vibration band of the surface hydroxyl groups has been found. Therefore, Δδ can also be used for the calculation of the deprotonation energy ΔE dp of surface hydroxyl groups by a previously developed method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eabd46337e0b931b07a76b491ef42692 https://doi.org/10.1016/0927-6513(96)00038-7 Zobrazit plný text záznamu Full Text from ScienceDirect