Shape of the local-vibration band of adsorbed hydrogen-bonded molecular complexes

Within the framework of a dephasing model, a simple expression is obtained that describes a change in the shape of the vibrational band of the hydroge n atom upon adsorption of hydrogen-bonded complexes. The surface effect is taken into account by introducing the parameter of removal of the degenerat ion of low-frequency libration modes. As a coupling of the complex with the surface increases, the width of the spectral band and shift of its maximum decrease, and their ratio increases from 1.38 to 2.45. (C) 2000 MAIK "Nauk a/Interperiodica".