Skip to main content
Log in

Relationship between multi-phase formation and molecular structure for liquid crystal system

  • Published:
Journal of Wuhan University of Technology-Mater. Sci. Ed. Aims and scope Submit manuscript

    We’re sorry, something doesn't seem to be working properly.

    Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Abstract

A mechanical model of liquid crystals (LCs) was used to explain the phase formation and thermal properties. The LC phases in the model are micro-machine systems consisting of an ensemble of molecular rotors, and some dynamic parameters in a semi-experiment molecular orbit method. A novel explanation on the multi-phase formation of LC system is obtained. It is found that the value of the critical rotational velocity is a key parameter for the characterization of each homologous series. The dipole moment of the molecules was also discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. K Toriyama and D A Dunmur. A Molecular Model for the Smetic B Phase-the Stabilized Molecular Rotor.Liq. Cryst., 1993, 13:797–810

    Article  CAS  Google Scholar 

  2. K Toriyama, H Kimura and H Onnagawa. Mechanical String Model for Liquid Crystal Ensemble: A Comprehensive Model for Polymorphism.Jpn. J. Appl. Phys., 2001, 40:5000–5007

    Article  CAS  Google Scholar 

  3. J Xu, H Okada, H Onnagawa, S Sugimori and K Toriyama. Liquid Crystal System as Molecular Machinery: Investigation of Dynamic Impedance Matching Between Molecular Core and Terminal Groups Using Rotor-Bearing Model.Jpn. J. Appl. Phys., 2000, 39:1801–1807

    Article  CAS  Google Scholar 

  4. H Ma, J Xu, H Okada, S Sugimori, H Onnagawa and K Toriyama. Mechanical Rotor Model for Fluorinated Terphenyl Liquid Crystals.Jpn. J. Appl. Phys., 2004, 4A, 43:148–171

    Google Scholar 

  5. H Ma, H Okada, S Sugimori, H Onnagawa and K Toriyama. A Mechanical Model Study on Correlations of Liquid Crystal Phase and Dynamic Parameters in Linear Molecules.Jpn. J. Appl. Phys., 2004, 5A, 43:2626–2627

    Article  CAS  Google Scholar 

  6. R Gasch, H Pfuytzner.Rotordynamik, Eine Einfuhrung. Berlin Springer-Verlag, 1975 [in German]

    Google Scholar 

  7. D Demus, J Goodby, G W Gray, H-W Spiess and V Vill.Handbook of Liquid Crystals. Wiley-VCH, Weinheim, 1998

    Google Scholar 

  8. S Mitra, R Mukhopadhyay, K Venu. Molecular Motions in Liquid Crystal BBBA (40.4): QENS Study.Chemical Physics, 2000, 261:149–156

    Article  CAS  Google Scholar 

  9. An J, Min X M, Nan C W, Cai K F. Structural Characteristics and Quantum Chemistry Calculation of Al-Doped Boron Carbides.J. Wuhan University of Technology-Mater. Sci. Ed., 2000, 15(3):27–32

    CAS  Google Scholar 

  10. Min X M, Xiao R J, Wang Han, Wang Wei-min. Electronic Structure and Chemical Band of Titanium Diboride.J. Wuhan University of Technology-Mater. Sci. Ed., 2003, 18(2):11–14

    Article  CAS  Google Scholar 

  11. B K Sadashiva, G S R S Rao. A Convenient Method for the Preparation of 4-n-alkyl-4″-cyano-p-terphenyl.Mol. Cryst. Liq. Cryst., 1977, 38:345–352

    Article  CAS  Google Scholar 

  12. A J Leadbetter, P A Tucker, G W Gray, A R Tajbakhsh. Unusual structures in some alkyl cyanoterphenyls.Liq. Cryst., 1990, 8:1–12

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Li Zhenxin Ph D candidate.

Additional information

Funded by the Key Technologies R and D Programme of Henan Province (No. 001120321)

Rights and permissions

Reprints and permissions

About this article

Cite this article

Zhenxin, L., Heng, M. & Shipu, L. Relationship between multi-phase formation and molecular structure for liquid crystal system. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 20, 11–13 (2005). https://doi.org/10.1007/BF02835015

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02835015

Key words

Navigation