Proton Spin-Lattice Relaxation in the Nematic Liquid Crystal MBBA
- 21 March 1972
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 16 (3) , 213-221
- https://doi.org/10.1080/15421407208083247
Abstract
In the nematic phase of p-methoxy benzylidene p-n-butylaniline, an increase in the proton spin-lattice relaxation time was observed over a small temperature range above 21 °C. It is proposed that this indicates that additional anisotropic fluctuations, associated with the onset of a biaxial phase, contribute to the proton spin-lattice relaxation in the region of 21 °C. A low frequency collective mode, ω s∼50 sec−1, relaxes the dipolar reservoir in the nematic phase. In the isotropic phase at ω L/2π = 15 MHz translation diffusion is the dominant relaxation mechanism.Keywords
This publication has 19 references indexed in Scilit:
- Proton Spin Relaxation in the Liquid Crystal PAAThe Journal of Chemical Physics, 1971
- Quadrupole and Proton Spin-Lattice Relaxation in the Nematic Liquid Crystalline PhaseMolecular Crystals and Liquid Crystals, 1971
- Molecular Description of Nematic Liquid CrystalsPhysical Review A, 1970
- Structure and physical properties of liquid crystalsC R C Critical Reviews in Solid State Sciences, 1970
- Spin-lattice relaxation in the nematic liquid crystalline phaseChemical Physics Letters, 1970
- Effects of Order and Fluctuations on theNMR in a Liquid CrystalPhysical Review Letters, 1970
- Proton Spin-Lattice Relaxation in Liquid CrystalsPhysical Review Letters, 1969
- Eine flüssig‐kristalline (nematische) Phase mit besonders niedrigem ErstarrungspunktAngewandte Chemie, 1969
- Spin Relaxation and Self-Diffusion in Liquid CrystalsPhysical Review Letters, 1969
- Nuclear relaxation in a nematic liquid crystalSolid State Communications, 1969