Publication Date:
2012-04-07
Description:
Experimental values of the mean polarizability of molecules, , and components of the Lorentz tensor, L j , in the nematic and smectic A phases are obtained for a homologous series of n -alkyl- p -(4-ethoxybenzylideneamino)-α-methylcinnamates. Dependences of the and L j values on the mesophase temperature, the orientational order parameter S of molecules, and the number n in the homologous series are revealed. The quadratic dependence of ( S ) in the nematic and smectic phases is established that is invariant with respect to the nematic-smectic A transition. Polarizability densities of the molecular core and the alkyl chain are found from the monotone decreasing dependence ( n )/ v (where v is volume per one molecule) in the smectic phase. The presence (or absence) of the odd-even alternation of L j ( n ) in the nematic (smectic) phase is shown. A monotone decrease in the Lorentz tensor anisotropy L with an increase in n is revealed in the smectic phase, and limiting values L j ( n → ∞) are determined. Content Type Journal Article Category Chemical Thermodynamics and Thermochemistry Pages 720-728 DOI 10.1134/S0036024412050044 Authors E. M. Aver’yanov, Kirenskiy Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036 Russia Journal Russian Journal of Physical Chemistry A, Focus on Chemistry Online ISSN 1531-863X Print ISSN 0036-0244 Journal Volume Volume 86 Journal Issue Volume 86, Number 5
Print ISSN:
0036-0244
Electronic ISSN:
1531-863X
Topics:
Chemistry and Pharmacology
,
Physics
