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Variable-angle spinning 1H NMR spectra of molecules in liquid-crystalline phases with positive and negative diamagnetic anisotropy

✍ Scribed by T. Väänänen; J. Jokisaari; M. Seläntaus

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
345 KB
Volume
129
Category
Article
ISSN
0009-2614

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✦ Synopsis

The 'H NMR spectrum of thiophene dissolved in the liquid crystals ZLI 1167 (with negative amsotropy of diamagnetic susceptibility, Ax) and ZLI 1132 (with positive Ax) was studied by applying the so-called variable-angle spinning (VAS) method. In this method, the liquid-crystal sample is spun with relatively high speed around an axis forming a certain adjustable angle with the external magnetic field. It is shown that a normal high-resolution spectrum with a varying scaling factor in the anisotropic parameters is obtained at any spin angIe between 0 and 90".

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