Synthesis and characterization of bonded phases made via hydrosilation of alkynes on silica hydride surfaces

The use of the silanization/hydrosilation method for the modification of silica is extended to include the bonding of alkynes to hydride surfaces. Diffuse reflectance infrared Fourier transform and cross-polarization and magic-angle spinning NMR studies confirm the bonding of several different types of alkynes to the silica hydride and elemental analysis indicates high surface coverage (>3.8 mu mol/m(2)) for four of the five bonded phases. Static stability tests indicate good resistance to hydrolysis at both high and low pH. Preliminary chromatographic evaluations of the bonded materials demonstrate good separation characteristics in both the reversed- and normal-phase modes. (C) 1998 Elsevier Science B.V. All rights reserved.