Chemistry Letters, Vol.29, No.3, 228-229, 2000
Novel silane coupling agents containing a photolabile 2-nitrobenzyl ester for introduction of a carboxy group on the surface of silica gel
Silane coupling agents containing a carboxy group are not known because the chloro- or alkoxy group is reactive to the carboxylic acid. In this study, silane coupling agents bearing a 2-nitrobenzyl ester as a protecting group of carboxylic acid were synthesized and applied for surface modification of silica gel followed by uv irradiation under neutral conditions to generate carboxy groups on the surface.