Molecular dynamics of n-octane inside zeolite ZSM-5 as studied by deuterium solid-state NMR and quasi-elastic neutron scattering

Article Abstract:

Research was conducted to examine the dynamics of a linear alkane, n-octane, adsorbed in zeolite ZSM-5 using deuterium solid state NMR and quasi-elastic neutron scattering. Results demonstrate that the peculiarity of the dynamic behavior of n-octane adsorbed in ZSM-5 varies according to the loading. Loadings that are equal to or higher than 3.5 molecules per unit cell reveal molecules with isotropic reorientation inside the zeolite channel system which may be due to collisions of the molecules at the channel intersections.

Neutrons, Alkanes, Adsorption, Deuterium, Neutron scattering

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Molecular dynamics of iso-butyl alcohol inside zeolite H-ZSM-5 as studied by deuterium solid-state NMR spectroscopy

Article Abstract:

The mobility and localization of iso-butyl alcohol inside the channel system of zeolite H-ZSM-5 was studied using (super 2)H NMR spectroscopy (super 20-22) to clarify the influence of zeolite walls and the interaction with zeolite acid sites on the motional behavior of the adsorbed alcohol molecules. The difference in the rotation rates is attributed to the influence of the walls of the zeolite channel on dynamics of one-axis methyl group rotation.

Science & research, Nuclear magnetic resonance spectroscopy, NMR spectroscopy

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Direct observation of unstable intermediate species in the reaction of trans-2-butene on ferrierite zeolite by picosecond infrared laser spectroscopy

Article Abstract:

The reaction dynamics of trans-2-butene absorbed to acidic hydroxyl groups on the surface of ferrierite zeolite was examined by the time-resolved spectroscopy using a tunable infrared picosecond pulse laser system. The result suggested the presence of a short-lived intermediate formed by reaction between the acidic hydroxyl groups and adsorbed trans-2-butene.

Analysis, Infrared spectroscopy

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