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AbstractAbstract
[en] Application of high resolution NMR techniques to study the molecular motion in solids and liquid crystals has been presented. A theory of NMR spectra and a theory of relaxation have been developed for rapidly-rotated solids whose spectra are narrowed by internal motion. The effect of molecular motion on resolution of the multipulse NMR technique has been calculated in the case of /1 3 2; 1 3 tilde 2/ /1 2 3; 1 2 tilde 3/ sequence. It has been shown, that in both techniques the molecular motion is an important factor limiting the resolution. It has been also found, that rotating frame relaxation T sub(1rhoR) for the spinning sample may extend the information of the conventional Tsub(1rho) about the slow molecular motion. Multipulse NMR techniques have been used to investigate the molecular motion in the lamellar mesophase of some lyotropic liquid crystals. A new method of direct measurement of the order parameter S has been developed, based on the analysis of the multipulse spectra. Chemical shift tensors have been also measured for the CF2 and CF3 groups in CsPFO molecule. (author)
Original Title
Badanie ruchow molekularnych cial stalych i cieklych krysztalow metoda magnetycznego rezonansu jadrowego o duzej zdolnosci rozdzielczej
Source
1977; 101 p; 74 refs.
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Report
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