Core-halogenated, helical-chiral triphenylene-based columnar liquid crystals

Liquid Crystals

Volumn 22, Issue 2, 1997, Pages 113-119

  Praefcke, Klaus ^a   Eckert, Andreas ^a   Blunk, Dirk ^a  

^a TECHNISCHE UNIVERSITÄT BERLIN   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000363627     PISSN: 02678292     EISSN: 13665855     Source Type: Journal    
DOI: 10.1080/026782997209478     Document Type: Article

References (42)

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3. Boden, N., Bushby, R. J., Cammidge, A. N., and Headdock, G., 1995, J. mater. Chem., 5, 2275.
4. Henderson, p., Kumar, S., Rego, J. A., Ringsdorf, H., and Schuhmacher, P., 1995, J. chem. Soc., chem. Commun., 1059.
5. A selection for oxygen-bridged cases: (a) Destrade, C., Mondon, M. C., and Malthete, J., 1979, J. Phys., 40, C3-17
6. (b) Kreuder, W., and Ringsdorf, H., 1983, Makromol. Chem., Rapid Commun., 4, 807
7. (c) Boden, N., Bushby, R. J., Ferris, L., Hardy, C., and Sixl, F., 1986, Liq. Cryst., 1, 109.
8. Sulfur-bridged cases: see in Kohne, B., Poules, W., and Praefcke, K., 1984, Chem. Ztg., 108, 113.
9. Selenium-bridged cases: see in Kohne, B., Praefcke, K., Derz, T., Frischmuth, V., and Gansau, C., 1984, Chem. Ztg., 108, 408.
10. A dam, D., Schuhmacher, p., Simmerer, J., HAussling, L., Siemensmeyer, K., Etzbach, K. H., Ringsdorf, H., and Haarer, D., 1994, Nature, 371, 141
11. 1994, Chem. Eng. News, 72, 19.
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13. With regard to our recently introduced change to nomenclature for columnar phases (basically Col instead of D) see: Praefcke, K., Bilgin, B., U sol’tseva, N., Heinrich, B., and Guillon, D., 1995, J. mater. Chem., 5, 2257
14. Praefcke, K., H olbrey, J. D., Usol’tseva, N., and Blunk, D., 1996, Mol. Cryst. liq. Cryst. (in the press).
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18. 1983, Synthesis, 751, including earlier papers cited therein
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22. A 4,5-disubstituted phenanthrene derivative as an example of a helical molecule described by Newmann, M. S., and Hussey, A. S., 1947, J. Amer. chem. Soc., 69, 978.
23. Enantiomerically pure liquid crystals from axial-chiral biphenyls described by Solladie, G., Hugele, P., Bartsch, R., and Skoulios, A., 1996, Angew. Chem., 108, 1640
24. 1996, Angew. Chem. Int. Ed. Engl., 35, 1533.
25. Boden, N., Bushby, R. J., Cammidge, A. N., Duckworth, S., and Headdock, G., J. mater. Chem. (submitted).
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27. For a similar discussion see Gray, G. W., 1979, The Molecular Physics of Liquid Crystals, edited by G. R. Luckhurst and G. W. Gray (London, New York, San Franscisco: Academic Press), Chap. 1, page 4.
28. Boden, N., and Headdock, G., private communication (29 July 1996) of the following unpublished 1H NMR data for the compound referred to in ref. [22]: 5 = 7-90 (aromatic hydrogen, 12-H) and 5 = 2-92 (methyl at C-1).
29. 1-Methyl-2,3,6,7,10,11-hexahexyloxytriphenylene, m.p. 60°C: Boden, N., Bushby, R. J., Cammidge, A. N., and Headdock, G., 1995, Synthesis, 31.
30. Analogies do exist in numerous intermolecular charge- transfer cases in which forces of the same nature may be involved besides ref.
31. Praefcke, K., and Singer, D., 1994, Mol. Mat., 3, 265, As well as in Handbook of Liquid Crystals, edited by D. Demus, J. W. Goodby, G. W. Gray, H. W. Spiess and V. Vill (Weinheim, New York, Basel, Cambridge, Tokyo: Verlag Chemie) (in the press).
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33. Posternak, Th., 1965, The Cyclitols (San Francisco: Holden-Day).
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37. Praefcke, K., Kohne, B., Psaras, p., and Hempel, J., 1991, J. Carbohyd. Chem., 10, 523
38. Praefcke, K., Marquardt, P., Kohne, B., and Stephan, W., 1991 J. Carbohyd. Chem., 10, 539.
39. Vill, V., Sauerbrei, B., Fischer, H., and Thiem, J., 1992, Liq. Cryst., 11, 949.
40. Praefcke, K., and Blunk, D., 1993, Liq. Cryst., 14, 1181.
41. Sucrow, W., and Brinkkotter, G., 1985, Chem. Ber., 118, 4430
42. Sucrow, W., and Howard, S., 1985, Chem. Ber., 118, 4341.