Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Dimesogenic Compounds Consisting of Two Identical Terminal N-(4-Oxybenzylidene)-4-n-butylaniline Units and a Central Polymethylene Spacer

  • Published : 1991.10.20
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Abstract

A series of dimesogenic compounds having two identical, terminal Schiff base type mesogens and a central polymethylene spacer were prepared and their properties were compared with those of the corresponding monomesogenic compounds. The mesomorphic properties of the compounds were studied by differential scanning calorimetry and on a hot-stage of a polarizing microscope. All of the dimesogenic compounds formed mesophases enantiotropically with the exception of pentamethylene-1,5-bis(4-oxybenzylidene 4-n-butylaniline). This compound was monotropic and formed only a nematic phase on heating the solid, whereas it formed nematic as well as smectic A phases on cooling the isotropic liquid. Those compounds containing longer (octamethylene and decamethylene) spacers favored the formation of nematic phase whereas those having shorter (dimethylene and tetramethylene) spacers formed smectic phases. In general, the variety of mesophase forms exhibited by the dimesogenic compounds was significantly less than that shown by the corresponding monomesogenic compounds.

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References

  1. Liquid Crystal & Plastic Crystals v.1 G. W. Gray(ed.);P. A. Winsor(ed.)
  2. Handbook of Liquid Crystals H. Kelker(ed.);R. Hatz(ed.)
  3. Angew, Chem. Internat. ed. v.8 H. Kelker;B. Scheurle
  4. J. Phys. Chem. v.74 J. B. Flannery, Jr.;W. Haas
  5. J. Chem. Soc.(D) D. L. Fishel;Y. Y. Hsu
  6. Mol. Cryst. Liq. Cryst. v.16 H. J. Dietrich;E. L. Steiger
  7. Mol. Cryst. Liq. Cryst. v.19 G. W. Smith;Z. G. Gardlund;R. J. Curtis
  8. Bull. Korean Chem. Soc. v.4 J. -I. Jin;J. -S. Kang;B. -W. Jo;R. W. Lenz
  9. Bull. Korean Chem. Soc. v.4 J. -I. Jin;Y. -S. Chung;R. W. Lenz;C. Ober
  10. Mol. Cryst. Liq. Cryst. v.110 J. -I. Jin;J. -H. Park
  11. Bull. Korean Chem. Soc. v.6 J. -I. Jin;C. -M. Sung;B. -W. Jo
  12. J. Am. Chem. Soc. v.107 A. C. Griffin;E. T. Samulski
  13. J. Chem. Soc., Perkin Trans. II J. -I. Jin;H. -T. Oh;J. -H. Park
  14. Polym. J. (Japan) v.18 H. Furuya;K. Asahi;A. Abe
  15. Macromolecules v.20 J. C. W. Chien;R. Zhou;C. P. Lillya
  16. Mol. Cryst. Liq. Cryst. v.162 C. Aguilera;S. Ahmad;J. Bartulin;H. J. Muller
  17. Mol. Cryst. Liq. Cryst. v.157 B. -W. Jo;T. K. Lim;J. -I. Jin
  18. Mol. Cryst. Liq. Cryst. v.162B C. A. Aguilera;J. Bartulin;H. J. Mueller
  19. Liq. Cryst. v.3 R. Centore;A. Roviello;A. Sirigu
  20. Liq. Cryst. v.5 W. Weissflog;D. Demus;S. Diele;P. Nitschke;W. Wedler
  21. Liq. Cryst. v.4 A. C. Griffin;S. L. Sullivan;W. E. Hughes
  22. Mol. Cryst. Liq. Cryst. v.170 P. Cerrada;M. Marcos;J. L. Serrano
  23. Bull. Korean Chem. Soc. v.11 no.3 J. -I. Jin;H. -S. Kim;J. -W. Shin;B. Y. Chung;B. -W. Jo
  24. Chem. Lett. v.6 T. Kato;A. Fujishima;J. M. J. Frechet
  25. Thermochimica Acta v.164 G. Poeti;E. Fanelli;D. Guillon
  26. Bull. Korean Chem. Soc. v.12 no.12 J. -I. Jin;B. Y. Chung;J. -K. Choi;B. -W. Jo
  27. Polym. J (Japan) v.14 C. K. Ober;J. -I. Jin;R. W. Lenz
  28. Mol. Cryst. Liq. Cryst. v.106 J. A. Buglione;A. Roviello;A. Sirigu
  29. Europ. Polym. J. v.23 no.12 J. -I. Jin;J. -H. Park
  30. Polym. J (Japan) v.18 J, -I. Jin;E. -J. Choi;S. -C. Ryu;R. W. Lenz
  31. Purification of Laboratory Chemicals(2nd ed.) D. D. Perrin;W. L. F. Armarego;D. R. Perrin
  32. Liquid Crystal & Plastic Crystals v.1 G. W. Gray(ed.);P. A. Winsor(ed.)
  33. Liquid Crystal & Plastic Crystals v.2 E. M. Barrall II;J. K. Johnson

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