The nuclear magnetic resonance lineshape of the protons in the amphiphik afkyl chains in tameliar liquid crystals is calculated. It is found that the inclusion of intramolecular dipoIar interactions not averaged to zero explains the shape of the experimentally observed spectrum.
Nuclear magnetic resonance in liquid crystals
β Scribed by C.C. Sung
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 308 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The applicatibn of the theory of nuclear magnetic resonance to liquid crystals is reexaminexi and reasonable agreement is found between the present theory and experimental results. On the basis of the theoretical work developed by De Cennes [l] and the Orsay Group [2] , Fincus [3] studied the relaxation time (Tr) of liquid crystals and obtained the field dependence (H) in good agreement with experimental results [4]. The predicted temperature (7') dependence is unsatisfactory as shown by Doane and Visintainer [5] , who also raised a few additional questions:
(1) why rotation ofH has no effect on Tl in smectic state in contrast to T2,
π SIMILAR VOLUMES
Rcccivcd 14 Scptcmbcr 1970 Anisotropies 01 the 13C shielding constant @UC) for CIinI and Cll+!X arc obtained from 'k SMi1 studies of these molcculcs in the ncmatic solvents. The results arc compnrcd with the Lhcorctkal vnlues obtained by the molccuklr orhitnl cnlculxtions using thz current theory. T