Evidence for the direct observation of molecular exchange of a liquid at the solid/liquid interface

Article Abstract:

The rate of exchange between the surface and bulk populations of strongly wetting liquids was measured by using optical Kerr effect (OKE) spectroscopy. OKE was employed to monitor the orientational dynamics of acetonitrile in the bulk and confined in nanoporous silicate glasses. In contrast with the orientational decay in the bulk liquid, which was determined by a single exponential, the confined liquid decays were determined by the sum of three exponentials. The results are discussed.

Usage, Molecules, Acetonitrile, Molecular spectroscopy

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Effects of molecular association on polarizability relaxation in liquid mixtures of benzene and hexafluorobenzene

Article Abstract:

A study describes the relaxation dynamics of the many body polarizability anisotropy in liquid mixtures of benzene (Bz) and hexafluorobenzene (Hf) at room temperature by femtosecond optical heterodyne detected Raman-induced Kerr effect spectroscopy experiments and molecular dynamics (MD) simulations. MD shows that the effect on R(t) is due to the formation of strong of strong localized intermolecular association between Bz and Hf species that hinders the rotational diffusive dynamics.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Petrochemical Manufacturing, Benzene, Fluorocarbons, Relaxation (Nuclear physics)

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Molecular dynamics study of polarizability anisotropy relaxation in aromatic liquids and its connection with local structure

Article Abstract:

The intermolecular dynamics and polarizability anisotropy relaxation in a set of aromatic liquids, benzene (Bz), hexafluorobenzene (HFB) and 1,3,5-trifluorobenzene (TFB) are studied by molecular dynamic (MD) simulations. The MD simulation data reveal that, despite the very similar molecular shapes, different charge distributions due to the different polarities of C-H and C-F bond lead to a very different local intermolecular structure in TFB from the structure in Bz and HFB.

Molecular dynamics, Aromatic compounds

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