Abstract
Recent time‐domain observations of molecular dynamics in simple liquids are discussed. Molecular orientational motion is shown to be vibrational (i.e., librational) in character at short times. In carbon disulphide (CS2), librational dephasing is due primarily to inhomogeneity in the liquid. Temperature‐dependent frequencies and inhomogeneous dephasing rates have been determined, providing information about configuration‐averaged intermolecular potentials and about the extent of inhomogeneity in the potentials. Experiments carried out under various conditions on CS2, CS2/hydrocarbon mixtures, and other liquids are discussed.
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