| | 1 | Author
| C. Cruz, P. J. Sebastião, J. Figueirinhas, A. C. Ribeiro, H. T. Nguyen, C. Destrade, F. Noack | Requires cookie* | | | Title
| NMR Study of Molecular Dynamics in a D ho Columnar Mesophase  | | | | Abstract
| In this paper we report the first molecular dynamics study combining fast field-cycling and conven-tional NMR techniques in a thermotropic liquid crystal of discotic molecules exhibiting an ordered columnar hexagonal mesophase. Using the association of these techniques we obtained proton T { data over a very large domain of Larmor frequencies (u/2n from 500 Hz to 85 MHz). The proton spin-lattice relaxation results were analysed considering the structure of the mesophase and the types of movements which are expected to influence significantly the relaxation rate, namely local molecu-lar rotational reorientations, inter-columnar self-diffusion and collective movements corresponding to bending and compression of the columns. We verified that these mechanisms dominate the relaxation respectively for high, medium and low Larmor frequencies. | | | |
Reference
| Z. Naturforsch. 53a, 823—827 (1998); received July 16 1998 | | | |
Published
| 1998 | | | |
Keywords
| NMR, Proton Relaxation, Molecular Dynamics, Columnar Hexagonal Mesophases (D ho ), Discotic Molecules | | | |
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| default:Reihe_A/53/ZNA-1998-53a-0823.pdf | | | | Identifier
| ZNA-1998-53a-0823 | | | | Volume
| 53 | |
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