A determination of individual spectral densities in a smectic liquid crystal from angle dependent nuclear spin relaxation measurements

Thomas Barbara, Regitze R. Void, Robert L. Void

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Abstract

Deuterium relaxation experiments have been carried out at 38.4 MHz from 29.9 to 44.3°C on p-butoxybenzylidene-p-n-octylaniline (40.8), a smectic B liquid crystal, which had been deuterated in the aniline ring and along the octyl chain. The Jeener-Broekaert pulse sequence was used to determine the spectral densities of motion J(ω) and J2(ω), and by rotating the sample such that the optic axis was oriented at three different angles to the external magnetic field we are able to obtain information about the frequency dependence not just of J1 and J2 but also of J0. We report here the first measurements of the latter parameter at frequencies other than zero.

Original languageEnglish (US)
Pages (from-to)6338-6340
Number of pages3
JournalThe Journal of Chemical Physics
Volume79
Issue number12
StatePublished - 1983
Externally publishedYes

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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