Bulletin of the Korean Chemical Society

  • 제4권4호
  • /
  • Pages.176-180
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  • 1983
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Synthesis and Properties of Thermotropic Compounds with Two Terminal Mesogenic Units and a Central Spacer Ⅲ. Homologous Series of $\alpha,\omega$-Bis[4-(p-nitrobenzoyloxy)phenoxy]alkanes

  • 발행 : 1983.08.20
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초록

A series of new liquid crystalline compounds having two identical mesogenic terminal units, the 4-(p-nitrobenzoyloxy)phenoxy group, attached to both ends of a central polymethylene spacer of various lengths was prepared. The mesomorphic properties of the compounds were investigated by differential scanning calorimetry (DSC) and by polarizing microscopy. Almost all of the compounds formed monotropic nematic mesophases. The trimethylene spacer compound was found to be non-liquid crystalline, while the one with the hexamethylene central spacer was enantiotropic. A thermodynamic analysis was performed for the phase transitions of the compounds and the results are discussed in relation to their liquid crystal properties.

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참고문헌

  1. Liquid Crystals and Plastic Crystals v.1 G. W. Gray;P. A. Winsor(eds.)
  2. The Molecular Physics of Liquid Crystals G.R. Luckhurst;G W. Gray(eds.)
  3. Mh. Chem. v.9 F. Reinitzer
  4. Mol. Cryst. Liq. Cryst. Letters v.82 J.-I. Jin;Y.-S. Chung;J.-S. Kang;R.W. Lenz
  5. Bull. Korean Chem. Soc. v.4 J.-I. Jin;Y.-S. Chung;C. Ober;R.W. Lenz
  6. J. Polymer Sci. Polymer Phys. Ed. v.19 A. C. Griffin;S.J. Havens
  7. J. Polymer Sci. Polymer Phys. Ed. v.19 S.M. Aharoni
  8. Mol. Cryst. Liq. Cryst. v.21 A. Saupe
  9. J. Polymer Sci. Polymer Chem. Ed. v.19 S. Antoun;R.W. Lenz;J.-I. Jin
  10. Liquid Crystals and Plastic Crystals v.2 G. W. Gray;P. A. Winsor(eds.)

피인용 문헌

  1. Thermotropic Compounds with Two Terminal Mesogenic Units and a Central Spacer. 51. Homologous Series of Polymethylene-α, ω-Bis (p-Oxybenzylidene Aniline) vol.110, pp.1, 1984, https://doi.org/10.1080/00268948408074511
  2. An Odd–Even Effect in the Mesophasic Behavior of Dimer Liquid Crystals Due to the Bond Orientation of a Phenylene Unit Incorporated in the Flexible Spacer vol.18, pp.10, 1986, https://doi.org/10.1295/polymj.18.779
  3. Synthesis and Properties of Thermotropic Liquid Crystals with Two Non-Mesogenic Units and a Flexible Central Spacer vol.170, pp.1, 1983, https://doi.org/10.1080/00268948908047749
  4. H-shaped dimeric LC compounds: synthesis and thermotropic properties of alpha, omega -bis\[2,5-bis(4-ethoxyphenoxycarbonyl)phenoxy]alkanes vol.25, pp.3, 1983, https://doi.org/10.1080/026782998206074
  5. Liquid Crystalline Properties of Dimesogenic Compounds Consisting of Two Different Azobenzene Types of Mesogens Interlinked Through Central Polymethylene Spacers vol.309, pp.1, 1983, https://doi.org/10.1080/10587259808045523
  6. Synthesis and liquid crystalline properties of T-shaped dimesogenic compounds vol.26, pp.11, 1983, https://doi.org/10.1080/02678292.1999.11509451
  7. Comparison of liquid crystalline properties of dimeric compounds of different skeletal shapes vol.28, pp.1, 1983, https://doi.org/10.1080/02678290010001725