Covalent functiona
lization and pore size manipulation were successfully achieved on ordered mesoporouscarbons, by using a method in which diazonium compounds were in-situ generated and reacted with thecarbon surface. Aryl groups substituted on the 4-poisiton (Ar-R, R = chlorine, ester, and alkyl) werecovalently attached to the surface of hexagonally structured carbon, which was synthesized using orderedsi
lica SBA-15 as template. The presence of these functional groups on the modified carbons was confirmedwith Fourier transform infrared spectroscopy, thermogravimetric analysis, electron microscopy, and nitrogenadsorption. A relatively high grafting density of ~1.5
![](/images/entities/mgr.gif)
mol/m
2 was achieved. Chemical modificationconsiderably changed the pore width from 3.0 nm for the unmodified samples to ~1.4 nm for modifiedsamples, while the primary hexagonal structure and the unit parameter of ordered mesoporous carbonwere retained after attachment of surface functiona
lities.