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Molecular Physics
An International Journal at the Interface Between Chemistry and Physics
Volume 53, 1984 - Issue 4
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Original Articles

The orientational order of nematogenic molecules with a flexible core

A dramatic odd-even effect

J.W. Emsley Department of Chemistry, The University, Southampton, SO9 5NH, England
,
G.R. Luckhurst Department of Chemistry, The University, Southampton, SO9 5NH, England
&
G.N. Shilstone Department of Chemistry, The University, Southampton, SO9 5NH, England
Pages 1023-1028 | Received 18 Jul 1984, Accepted 28 Jul 1984, Published online: 22 Aug 2006
 
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Abstract

The orientational order of the α,ω-bis(4,4′-cyanobiphenyloxy)alkanes, new nematogens with a flexible core linking two rigid groups has been studied using deuterium N.M.R. spectroscopy. The order parameter for the para-axis of the cyanobiphenyl group, determined at the nematic-isotropic transition, is found to be considerably greater for members of the homologous series with an even number of methylene groups than for those with an odd number.

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