Abstract
Most binary mesophase systems exhibit mesophase-isotropic transition temperatures which are linearly dependent on composition. There are however exceptions. Demus (1) reported non-linear behavior for some mixtures when one component was a chloro mesogen. Dave (2) found similar behavior with chloro and nitro liquid crystals and postulated a structural rationale based on dipolar characteristics of the constituent molecules. Schroeder and Schroeder (3) reported in 1968 that non-mesomorphic nitro-terminated anils enhanced (4) the smectic phase of di-n-hexyloxyazoxybenzene. These authors suggested a loose dimeric association of the nitro anils as part of a molecular explanation for this enhanced smectic phase.
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
H. Sackmann and D. Demus, Z. Physik. Chem. (Leipzig), 224, 177 (1963) and H. Sackmann and D. Demus, ibid, 230, 285 (1965).
J. S. Dave, P. R. Patel and K. L. Vasanth, Indian J. Chem., 4, 505 (1966); Mol. Cryst. Liquid Cryst., 8, 93 (1969).
J. P. Schroeder and D. C. Schroeder, J. Org. Chem., 33, 591 (1968).
We use the term “enhanced” to described maxima in transition lines, following the useage of J. S. Dave and R. A. Vora in Liquid Crystals and Plastic Crystals, Vol. 1, G. W. Gray and P. A. Winsor, eds., Ellis Horwood Ltd., Chichester, England, 1974, p. 167.
J. W. Park, C. S. Bak and M. M. Labes, J. Amer. Chem. Soc., 97, 4398 (1975).
J. W. Park and M. M. Labes, Mol. Cryst. Liquid Cryst., Letters, 34, 147 (1977).
C. S. Oh, Mol. Cryst. Liquid Cryst., in press.
A. C. Griffin and J. F. Johnson, J. Amer. Chem. Soc., 99, 4859 (1977).
The term “bimolecular smectic” is used to describe a molecular arrangement in which d>l. It is our feeling that “bimolecular” used to describe one smectic layer in which two molecules must participate, is preferable to “bilayered” smectic which might be interpreted as two layers.
D. L. Fishel and P. R. Patel, Mol. Cryst. Liquid Cryst., 17, 139 (1972).
L. Kofler and A. Kofler, Thermomikromethoden, Verlag Chemie, Weinheim, 1954.
D. Coates and G. W. Gray, J. Chem. Soc., Perkin II, 300 (1976).
A. C. Griffin and N. W. Buckley, to be published.
R. Foster, Organic Charge-Transfer Complexes, Academic Press, London, 1969.
W. B. Person and R. S. Mulliken, Molecular Complexes: A Lecture and Reprint Volume, Wiley, New York, 1969.
M. E. Neubert, L. T. Carlino, R. D’Sidocky and D. L. Fishel, Liquid Crystals and Ordered Fluids, Vol. 2, J. F. Johnson and R. S. Porter, eds., Plenum Press, New York, 1974, p. 293.
P. E. Cladis, R. K. Bogardus, W. B. Daniels, and G. N. Taylor, manuscript submitted for publication.
A. C. Griffin, unpublished work.
Reference 14, p. 199.
P. Job, Compt. Rend., 180, 925 (1925); Ann. Chim, [10], 9, 113 (1928); Ann. Chim. [11], 6, 97 (1936).
M. J. S. Dewar and A. C. Griffin, J. Amer. Chem. Soc., 97, 6662 (1975).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1978 Springer Science+Business Media New York
About this chapter
Cite this chapter
Griffin, A.C., Britt, T.R., Buckley, N.W., Fisher, R.F., Havens, S.J., Goodman, D.W. (1978). Effect of Molecular Structure on Mesomorphism. 6. Non-Linear Thermal Behavior in Some Binary Liquid Crystal Systems. In: Johnson, J.F., Porter, R.S. (eds) Liquid Crystals and Ordered Fluids. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-8888-7_5
Download citation
DOI: https://doi.org/10.1007/978-1-4615-8888-7_5
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-8890-0
Online ISBN: 978-1-4615-8888-7
eBook Packages: Springer Book Archive