Probing the alkyl ligands on silylated mesoporous MCM-41 using hyperpolarized129Xe NMR spectroscopy
Journal
Journal of Physical Chemistry B
Journal Volume
109
Journal Issue
2
Pages
681-684
Date Issued
2005
Author(s)
Huang, S.-J.
Huang, C.-H.
Chen, W.-H.
Sun, X.
Zeng, X.
Lee, H.-K.
Ripmeester, J.A.
Liu, S.-B.
Abstract
Variable-temperature hyperpolarized (HP) 129Xe NMR spectroscopy has been employed to characterize surface properties of mesoporous MCM-41 modified by silylation treatment. The characteristic chemical shifts responsible for Xe-surface interactions exhibit strong correlations with both the surface coverage and chain length of the grafted alkylsilanes. Consequently, the deshielding medium contribution due to individual alkyl ligand can be deduced based on the group contribution analysis revealing the potential use of HP 129Xe NMR for probing the surface properties of organic-functionalized porous materials.
SDGs
Type
journal article