Molecular ordering and even--odd effect in a homologous series of nematic liquid crystals. [P-alkoxyazoxybenzenes]

Journal Article · Mon Oct 21 04:00:00 EDT 1974 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.33.1002· OSTI ID:7343388

Pines, A; Ruben, D J; Allison, S

Order parameters have been measured in a homologous series of nematic liquid crystals, p-alkoxyazoxybenzenes, by /sup 13/C NMR. The ordering exhibits an even-odd alternation along the series, and a comparison of our data at the isotropic-nematic transition temperatures is made for the first time with a recent theory of Marcelja which explicitly accounts for end-chain interactions between the molecules. Some conclusions are drawn concerning molecular conformational motion and /sup 14/N spin relaxation in the nematic phase.

• Research Organization: Univ. of California, Berkeley
• OSTI ID: 7343388
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 33:17; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AROMATICS
CARBON 13
CARBON ISOTOPES
CRYSTALS
ENTROPY
EVEN-ODD NUCLEI
FLUIDS
ISOTOPES
ISOTROPY
LIGHT NUCLEI
LIQUID CRYSTALS
LIQUIDS
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORDER PARAMETERS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RELAXATION
RESONANCE
SPIN-SPIN RELAXATION
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE