21Ne NMR spectroscopy: temperature dependence of the 21Ne quadrupole coupling and electric field gradient in a liquid crystal
✍ Scribed by P. Ingman; J. Jokisaari; O. Pulkkinen; P. Diehl; O. Muenster
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 340 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The "Ne NMR spectrum of Z'Ne-enriched neon gas dissolved in the anisotropic phase of the thermotropic liquid crystal ZLII 167 was recorded at various temperatures. The curve obtained by plotting the absolute value of the quadrupole coupling constant, 1x1, as a function of temperature is found to possess a maximum in the nematic range. This is considered as an indication of at least two contributions to the total electric field gradient at the nucleus. After the transltion to the smectic A phase, 1x1 starts to increase without detectable discontinuity to low temperature. The results are compared to the corresponding ones measured earlier for 83Kr and "'Xe.