| abstract |
A modified silica support having a polar phase bonded to the surface of the silica support and suitable for use in chromatography separation, wherein the modified silica support has the formula (I): n (I) n Where n m is 0 to 20; n is 0 to 20; p is 1 to 50; n X is sulfonyl, carbonyl, carbamoyl or oxycarbonyl; n R 1 is H, an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group; n R 2 is an alkyl group, substituted alkyl group, aryl group or substituted aryl group; n R 3 and R 4 are groups containing an oxygen atom crosslinked with an alkyl group, an aryl group, a hydroxyl group, an alkoxyl group or a silicon atom. Also, a polar silane intermediate for preparing the support. |