Propylene-bridged bidentate silanes

Details Propylene-bridged bidentate silanes Propylene-bridged bidentate silanes

1999-04-16

2000-05-02

Wu, David W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556465, C07F 710

Patent

active

060574682

ABSTRACT:
The present invention provides propylene-bridged bidentate silane reagents for modifying the surface of liquid chromatography supports, these supports and methods of making and using the same. When bonded to the surface of a support material, the resulting modified support material provides improved properties, such as better separations and more stable support materials, especially when used in liquid chromatography. These bidentate silanes have the general structure: RSiMe(NMe.sub.2)--(CH.sub.2).sub.3 --SiMeR--NMe.sub.2. R is an n-octadecyl group or an n-tetradecyl group, and Me is a methyl group. When reacted with a silica surface, the resulting modified surface has a structure: PSiO--[RSiMe--(CH.sub.2).sub.3 --SiMeR]--OSiP. PSiO is surface-reacted silica.

REFERENCES:
patent: 4746572 (1988-05-01), Glajch et al.
patent: 5869724 (1999-02-01), Kirkland et al.

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