The role of electrical property derivatives in intermolecular vibrational interactions and their effects on vibrational spectra

摘要

The relations between various formulas containing electrical property derivatives are examined in detail to help understand different forms of intermolecular vibrational interactions in a consistent way. By using the derivative relations among potential energy, dipole moment and polarizability, it is suggested that the formula for the dipole-induced-dipole (DID) mechanism should be extended to include an additional term, which may be called " [mubeta] term". The effect of this [mubeta] term in the extended dipole-induced-dipole (XDID) mechanism is discussed by taking the case of the low-frequency Raman spectral profile of liquid formamide as an example. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 24]