A 2H NMR study of orientational order, phase transitions and dynamics in a liquid crystalline compound

D. Catalano, E. Ciampi, K. Fodor-Csorba, C. Forte, M. Geppi, D. Imbardelli

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

2H-NMR spectroscopy is employed to investigate the orientational order in the nematic and smectic A, B, and crystal G phases formed by 4-(2-methylbutyl)phenyl 4′n-heptylbiphenyl-4-carboxylate-d18. Evidence of the lock in the maws-conformation of the first two methylene groups of the n-heptyl chain is found in the SB and G phases. The dynamics of the aromatic molecular core are studied in a temperature interval including the SA-SB transition, by the analysis of the deuterium Zeeman and Quadrupolar relaxation times using the rotational diffusion model. Hence the diffusion constants related to the molecular spinning and tumbling motions are evaluated.

Original languageEnglish
Pages (from-to)927-932
Number of pages6
JournalLiquid Crystals
Volume21
Issue number6
Publication statusPublished - Dec 1996

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Phase transitions
tumbling motion
Nuclear magnetic resonance
Crystalline materials
Barreling
nuclear magnetic resonance
Deuterium
Liquids
liquids
methylene
Relaxation time
metal spinning
carboxylates
Nuclear magnetic resonance spectroscopy
Conformations
deuterium
relaxation time
intervals
Crystals
spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Catalano, D., Ciampi, E., Fodor-Csorba, K., Forte, C., Geppi, M., & Imbardelli, D. (1996). A 2H NMR study of orientational order, phase transitions and dynamics in a liquid crystalline compound. Liquid Crystals, 21(6), 927-932.

A 2H NMR study of orientational order, phase transitions and dynamics in a liquid crystalline compound. / Catalano, D.; Ciampi, E.; Fodor-Csorba, K.; Forte, C.; Geppi, M.; Imbardelli, D.

In: Liquid Crystals, Vol. 21, No. 6, 12.1996, p. 927-932.

Research output: Contribution to journalArticle

Catalano, D, Ciampi, E, Fodor-Csorba, K, Forte, C, Geppi, M & Imbardelli, D 1996, 'A 2H NMR study of orientational order, phase transitions and dynamics in a liquid crystalline compound', Liquid Crystals, vol. 21, no. 6, pp. 927-932.
Catalano, D. ; Ciampi, E. ; Fodor-Csorba, K. ; Forte, C. ; Geppi, M. ; Imbardelli, D. / A 2H NMR study of orientational order, phase transitions and dynamics in a liquid crystalline compound. In: Liquid Crystals. 1996 ; Vol. 21, No. 6. pp. 927-932.
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