Motion of Organic Species Occluded or Sorbed within Zeolites.

摘要

Containment of organic species within microporous materials such as zeolites influences their modes of molecular motion. This manifests itself in a range of ways, including a reduction in the volume that is readily accessible to the molecules by translation, constraints upon the molecular conformational space, restricted modes of molecular reorientation, or altered vibrational frequencies. The perspectives on certain of the motional properties of sorbates and of tetramethylammonium cations within zeolites provided by simple molecular modeling, neutron powder diffraction, sup 13 C and sup 2 H(D), and inelastic and quasielastic neutron scattering are outlined and illustrated by selected recent results. 56 refs., 5 figs. (ERA citation 14:016576)