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Deuterium NMR of biaxial discotic liquid crystals

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons128263

Zimmermann,  Herbert
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
Zimmermann Group, Max Planck Institute for Medical Research, Max Planck Society;
Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Zitation

Goldfarb, D., Poupko, R., Luz, Z., & Zimmermann, H. (1983). Deuterium NMR of biaxial discotic liquid crystals. The Journal of Chemical Physics, 79(8), 40335-4047. doi:10.1063/1.446272.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0019-AFC2-2
Zusammenfassung
Deuterium NMR spectra of deuterated probe molecules dissolved in several discotic liquid crystals possessing biaxial mesophases are reported. The spectra exhibit typical features characteristic of biaxial phases. This is particularly manifested through the asymmetry parameter of the average quadrupole tensor. The effect is demonstrated on two types of biaxial discotic phases: (i) a rectangular Drd mesophase which appears in homologs of triphenylenehexa‐n‐alkanoates; and (ii) a tilted Dt mesophase which occurs in homologs of benzenehexa‐n‐alkanoates. The theory relating to the motional constants in biaxial phases and the asymmetry parameter of the quadrupole tensor (and other tensorial properties) is reviewed, and applied to some specific examples.