Abstract
Samples of p-n-nonyloxybenzoic acid have shown a positive conductivity anisotropy in the nematic phase immediately after heating from the solid, but after a number of hours the anisot-ropy changed to negative. A possible explanation for this change is the formation of clusters of molecules by polymerization. The clusters could be linear polymers involving hydrogen bonds. A study of the temperature dependence of the conductivity anisotropy indicated that other mechanisms are involved such as the formation of cybotactic groups involving dimers. Molecular alignment due to ionic conductivity is discussed in both the nematic and smectic phases. The dielectric anisotropy which is positive in the nematic phase decreases with decreasing temperature and reverses sign as the material enters the smectic phase.
Supported by U. S. Army Research Office, Durham, Grant No. DA-ARO-D-31-124-G135.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
D. P. McLemore and E. F. Carr, J. Chem. Phys. 57, 3245 (1972).
A. De Vries, Mol. Cryst. Liq. Cryst. 10, 219 (1970).
F. Rondelez, Solid State Comm. 11, 1675 (1972).
E. F. Carr, Mol. Cryst. and Liq. Cryst. 13, 27 (1971).
L. S. Chou and E. F. Carr, Phys. Rev. A, 7, 1639 (1973).
L. S. Chou and E. F. Carr, Bull. Am. Phys. Soc. 18, 437(1973).
E. F. Carr and L. S. Chou, J. Appl. Phys. (to be published July 1973).
E. F. Carr, Adv. Chem. Ser. 63, 76 (1967).
G. W. Gray, Molecular Structure and the Properties of Liquid Crystals, Academic Press, Inc.(London). Ltd., London (1962).
C. C. Gravatt and G. W. Brady, Mol. Cryst. and Liq. Cryst. 7, 355 (1969);
T. W. Stinson and J. D. Litster, Phys. Rev. Lett. 25, 503 (1970);
B. Chu, C. S. Bak. and F. L. Lin, Phys. Rev. Lett. 28, 1111 (1972).
W. Maier and G. Meier, Z. Naturforsch, A 16, 1200. (1961).
Anna J. Martin, G. Meier, and A. Saupe, Symposium of the Faraday Society, No. (5), 119 (1971).
B. Delodre and B. Cabane, Mol. Cryst. Liq. Cryst. 19, 25 (1972).
T. R. Taylor, J. L. Fergason, and S. L. Arora, Phys. Rev. Lett. 24, 359 (1970).
E. F. Carr, Mol. Cryst. Liq. Cryst. 7, 253 (1969).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1974 Plenum Press, New York
About this chapter
Cite this chapter
Chou, L.S., Carr, E.F. (1974). Electric Field Effects in the Nematic and Smectic Phases of P-N-Nonyloxybenzoic Acid. In: Johnson, J.F., Porter, R.S. (eds) Liquid Crystals and Ordered Fluids. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-2727-1_5
Download citation
DOI: https://doi.org/10.1007/978-1-4684-2727-1_5
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-2729-5
Online ISBN: 978-1-4684-2727-1
eBook Packages: Springer Book Archive