Abstract:

The silica gel carried γ-chlopropyltrimethoxysilane and γ-aminopropyl trimethoxysilane were characterized by nuclear magnetic resonance spectrometry.  It was shown that the hydroxyl groups on the surface of silica gel substrate giv es only non-distinctive bands. The intensities of the bands related to the surface hydroxyl groups can be remarkably enhanced by cross polarization. The result  suggests that γ-chlopropyltrimethoxysilane and γ-aminopropyltrimethoxysilane  we recarried on the surface of the silicagel, and the reactions were relatively completed.

Key words: nuclear magnetic resonance spectrometry, silica gel carrier, surface hydroxyl groups, carrying reaction