Abstract

By using continuum methods to describe dipole-dipole interactions, a quantitative interpretation is given of the regularities of the shift and broadening of the powerful IR absorption band of the antisymmetric valence vibration of the CS2 molecule that accompanies the vapor-liquid phase transition. It is confirmed that the predominant contribution to the formation of the experimentally observed spectrum of the absorption index kappa (nu) of liquid CS2 in the 1450-1550-cm -1 region comes from intermolecular forces of a resonance nature. It is established that the Brownian broadening mechanism is the main molecular mechanism that determines the contour of the nu3 band in the spectrum of the Einstein coefficient for absorption, B(nu). © 2003 Optical Society of America

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