IR and Raman spectra of a water-methane disperse system. Computer experiment

Abstract

Methane adsorption by water clusters is studied using a flexible molecule model. An increase in the number of methane molecules surrounding a water cluster leads to their structurization in its vicinity. The pattern of the frequency spectrum of complex permittivity strongly changes after methane molecules are cap tured by the disperse water system. The integral intensity of IR absorption grows with methane adsorption, whereas the Raman spectrum of the system is considerably depleted. Methane absorption markedly enhances the reflectivity and IR emission ability of the disperse system.