New type of twisted mesophase in jellies and solid films of chiral 12-hydroxyoctadecanoic acid

Abstract

SOME optically active substances are known to form a unique state of matter, the twisted mesophase, in which a supramolecular helical structure gives rise to some striking optical phenomena1. This type of structure was first found in melts of single compounds and later in solutions of some biopolymers. The only lyotropic twisted mesophases reported so far are the cholesteric (twisted nematic) type. However, we describe here a new type, found in the thermally-reversible jellies formed by chiral 12-hydroxyoctadecanoic acid (12HOA) with CC14 or aromatic solvents; solid films obtained by drying the jellies on quartz supports retained the twisted structure. Microscopy and circular dichroism (CD) indicated that this mesophase had a supramolecular helical structure, and X-ray examination of the dried solid films indicated that it was not a nematic type, but probably smectic.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Saupe, A. in Liquid Crystals and Plastic Crystals Vol. 1 (eds Gray, G. W. & Winsor, P. A.)18–47 (Ellis Norwood, Chichester, 1974).

    Google Scholar 

  2. 2

    Tachibana, T. & Kambara, H. Bull. chem. Soc. Jap. 42, 3422–3425 (1968).

    Article  Google Scholar 

  3. 3

    Tunis-Schneider, M. J. B. & Maestre, M. F. J. molec. Biol 52, 521–541 (1970).

    CAS  Article  Google Scholar 

  4. 4

    Saeva, F. D. & Olin, G. R. J. Am. chem. Soc. 95, 7882–7884 (1973).

    CAS  Article  Google Scholar 

  5. 5

    Sakamoto, K., Yoshida, R., Hatano, M. & Tachibana, T. J. Am. chem. Soc. 100, 6898–6902 (1978).

    CAS  Article  Google Scholar 

  6. 6

    Taniguchi, Y. & Suzuki, K. J. phys. Chem. 78, 759–761 (1974).

    CAS  Article  Google Scholar 

  7. 7

    Samulski, E. T. & Tobolsky, A. V. in Liquid Crystals and Plastic Crystals Vol. 2 (edg Gray, G. W. & Winsor, P. A.) 175–198 (Ellis Horwood, Chichester, 1974).

    Google Scholar 

  8. 8

    von Sydow, E. Acta crystallogr. 8, 557–560 (1955).

    Article  Google Scholar 

  9. 9

    Malta, V., Celotti, G., Zannetti, R. & Martelli, A. F. J. chem. Soc. B, 548–553 (1971).

  10. 10

    Tachibana, T. & Kambara, H. Kolloid-Z. Z. Polymere 219, 40–42 (1967).

    CAS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

TACHIBANA, T., MORI, T. & HORI, K. New type of twisted mesophase in jellies and solid films of chiral 12-hydroxyoctadecanoic acid. Nature 278, 578–579 (1979). https://doi.org/10.1038/278578a0

Download citation

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing