Infrared spectra were recorded of anisole adsorbed on porous glass which had been dehydroxylated to various extents, on highly dehydroxylated silica, and on fully fluoridated porous glass. Spectra recorded at various surface coverages showed 2 broad bands near 3600 and 3400 cm−1 due to perturbed surface hydroxyls, indicating that the adsorbed anisole was weakly held to the surface in 2 ways. The surface structures and mechanism are discussed.