NMR study of adsorption techniques for organic compounds on silica surfaces

Authors
Gunther, H Oepen, S Ebener, M Francke, V
Citation
H. Gunther et al., NMR study of adsorption techniques for organic compounds on silica surfaces, MAGN RES CH, 37, 1999, pp. S142-S146
Citations number
14
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
MAGNETIC RESONANCE IN CHEMISTRY
ISSN journal
07491581 → ACNP
Volume
37
Year of publication
1999
Pages
S142 - S146
Database
ISI
SICI code
0749-1581(199912)37:<S142:NSOATF>2.0.ZU;2-1
Abstract
The adsorption of benzenoid aromatic compounds on porous silica has been st udied by C-13 and F-19 NMR and by BET measurements. Small chemical shifts b etween the resonances of methyl groups or fluorine substituents in the micr ocrystalline bulk material and the adsorbed species can be used to monitor the degree of adsorption. The results for various adsorption techniques, in particular dry adsorption by grinding mixtures of organic material and sil ica or by ball mill treatment of such mixtures are compared. Annealing and ball mill treatment was found to be most effective. Copyright (C) 1999 John Wiley & Sons, Ltd.