Liquid Crystalline Polymorphism of 4-Alkyloxybenzylidene-4'-Alkyloxyanilines and Entropic Effects of Their Phase Transitions

• Authors: J. Godzwon , M. Sienkowska , Z. Galewski
• Languages of publication: EN

Abstracts

EN

This paper summarizes liquid-crystalline polymorphism of the asymmetrical 4-alkyloxybenzylidene-4'-alkyloxyanilines. In this group, containing 121 compounds, 6 types of mesophases were detected: nematic, smectic A, smectic C, smectic B, smectic I, and smectic G. Influence of both alkyl chain length on the type of mesophases and entropic effects of phase transitions are discussed.

Keywords

EN

64.70.M-; 65.40.gd; 64.70.pp

Discipline

• 65.40.gd: Entropy
• 64.70.M-: Transitions in liquid crystals
• 64.70.pp: Liquid crystals(see also 64.70.M- Transitions in liquid crystals)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 4
• Pages: 1145-1154

Dates

published

2008-04

received

2007-06-03

Contributors

author

J. Godzwon

• Faculty of Chemistry, University of Wrocław, 14, Joliot-Curie, 50-383 Wrocław, Poland

author

M. Sienkowska

• Faculty of Chemistry, University of Wrocław, 14, Joliot-Curie, 50-383 Wrocław, Poland

author

Z. Galewski

• Faculty of Chemistry, University of Wrocław, 14, Joliot-Curie, 50-383 Wrocław, Poland

References

• 1. M. Schadt, W. Helfrich, Appl. Phys. Lett. 18, 127 (1971)
• 2. T. Niori, T. Sekane, J. Watanabe, T. Furukawa, H. Takezoe, J. Mater. Chem. 6, 1231 (1996)
• 3. V. Bertleff, Dissertation, Halle, 1908
• 4. H. Haberland, Berichte 58, 2652 (1925)
• 5. C. Weygand, R. Gabler, J. Prakt. Chemie N.F. 151, 215 (1938)
• 6. C. Weygand, R. Gabler, J. Prakt. Chemie N.F. 155, 332 (1940)
• 7. J. Godzwon, M.J. Sienkowska, Z. Galewski, Liq. Cryst. 34, 911 (2007)
• 8. J. Godzwon, M.J. Sienkowska, Z. Galewski, Phase Transit. 80, 217 (2007)
• 9. J. Godzwon, M.J. Sienkowska, Z. Galewski, Phase Transit 80, 1 (2007)
• 10. J. Godzwon, M.J. Sienkowska, Z. Galewski, J. Mol. Struc. 844-845, 259 (2007)
• 11. J. Godzwon, M.J. Sienkowska, Z. Galewski, in: Conf. Proc., XVI Conf. on Liquid Crystals, Stare Jabłonki (Poland) 2005, Eds. P. Perkowski, Z. Raszewski, J. Zieliński, Publishing House Military University of Technology (MUT), Warsaw 2005, p. 29
• 12. D. Demus, L. Richter, Textures of Liquid Crystals, VEB Verlag, Leipzig 1980
• 13. V. Vill, LiqCryst4.6 database, LCI, Fujitsu 2005
• 14. N. Ajeetha, V.G.K.M. Pisipati, M. Ramakrishna Nanchara Rao, P.V. Datta Prasad, Mol. Cryst. Liq. Cryst. 457, 3 (2006)
• 15. C. Gandolfo, D. Grasso, Termochim. Acta 65, 239 (1983)
• 16. P. Papon, J. Leblond, P.H.E. Meijer, The Physics of Phase Transitions, 2nd ed., Springer Verlag, Berlin 2006
• 17. D. Marzotko, D. Demus, in: Liquid Crystals, Proc. Int. Conf., Pramana, Ed. S. Chandrasekhar, Indian Academy of Science, Bangalore 1973, Suppl. No. 1, p. 189
• 18. D. Guillon, in: Handbook of Liquid Crystals, Eds. D. Demus, J. Goodby, G.W. Gray, H.-W. Spiess, V. Vill, Wiley-VCH, Weinheim 1998, Vol. 2A, p. 23
• 19. A.J. Leadbetter, in: The Molecular Physics of Liquid Crystals, Eds. G.R. Luckhurst, G.W. Gray, Academic Press, London 1979, p. 285
• 20. J.M. Seddon, in: Handbook of Liquid Crystals, Eds. D. Demus, J. Goodby, G.W. Gray, H.-W. Spiess, V. Vill, Wiley-VCH, Weinheim 1998, p. 635
• 21. P.W. Atkins, Physical Chemistry, 6th ed., Oxford University Press, Oxford 1998
• 22. K. Saito, M. Ikeda, M. Sorai, J. Therm. Analysis Calorimetry 70, 345 (2002)
• 23. G.R. Luckhurst, in: The Molecular Physics of Liquid Crystals, Eds. G.R. Luckhurst, G.W. Gray, Academic Press, 1979
• 24. F.T. Trouton, Philos. Mag. 18, 54 (1884)
• 25. R. Berardi, L. Muccioli, C. Zannoni, Chem. Phys. Chem. 5, 104 (2004)
• 26. Z. Galewski, M. Sienkowska, A. Hofmańska, Proc. SPIE 4759, 85 (2002)

Identifiers

DOI

10.12693/APhysPolA.113.1145