Sapiga A. Investigation structure and molecular mobility in a natrolite by NMR line shape

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0403U003281

Thesis Registration Form

0403U003281.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

03-10-2003

Specialized Academic Board

К52.051.02

Essay

NMR and thermogravimetric methods was used for investigate a diffusion of water in a natrolite channels and influence of partial dehydration for the process of a diffusion. In a natrolite take a place a regular three-dimensional diffusion. The barrier of diffusion in natrolite channel depends on thermal history of crystal. Influence on a water molecular mobility on a silica-alumina framework stability and sodium ions position was investigated. The method of "moment" and method of chaotic trajectories was used for calculations of the proton NMR spectra. It is shown that in a temperature range of Pake doublets' averaging the form of spectra is determined by effects of frequency exchange. It was show to necessity taking into account of correlation time distribution of molecular mobility. The possible reasons of availability of such distribution in a solid state are discussed

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