Infrared spectra of surface hydroxyl groups and crystalline structure of oxides

An interpretation of the infrared spectra of surface hydroxyl groups based on crystal structure considerations has been suggested for a large number of oxides. The free hydroxyl groups proved to be of several distinct types, the number of which depends on the oxygen coordination in the bulk lattice. Such an approach gives an understanding of certain properties of surface hydroxyl species, and it can be used for the interpretation of spectra of some other functional groups.