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Absolute determination of the orientational order quality in a columnar discotic liquid crystal

  • M. Ndao (a1), R. Lefort (a1), P. Huber (a2), J.-M. Zanotti (a3), B. Frick (a4), A. Schoenhals (a5) and D. Morineau (a1)...


Simple NMR techniques can provide an absolute quantification of the quality of the orientational order of discotic columnar phases, provided the anisotropic local magnetic interactions are thoroughly characterized. For the prototypical discotic liquid crystal hexapentoxy-triphenylene, we measure the 13C chemical shift anisotropy of the triphenylene carbons, and use this result to analyze the orientational order, that occurs through a first order phase transition from the high temperature liquid phase, and is almost saturated (order parameter close to 0.85).


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1. Shaw, J. M., Seidler, P. F., “Organic electronics: Introduction”, IBM J. Res. & Des. 45 (2001)
2. Sheats, J. R., Antoniadis, H., Hueschen, M., Leonard, W., Miller, J., Moon, R., Roitman, D., and Stocking, A., “Organic Electroluminescent Devices,” Science 273, 884 (1996).
3. « Introduction to Printed Semiconductors », White Paper, Nanoindent Tech. AG (2007)
4. Gelinck, G.H., Huitema, H.E.A., van Veenendaal, E., Cantatore, E., Schrijnemakers, L., van der Putten, J.B.P.H., Geuns, T.C.T., Beenhakkers, M., Giesbers, J.B., Huisman, B.-H., Meijer, E.J., Benito, E.M., Touwslager, F.J., Marsman, A.W., van Rens, B.J.E., and de Leeuw, D.M., “Flexible active-matrix displays and shift registers based on solution-processed organic transistors.”, Nature Materials, 3(2): p. 106110. (2004)
5. Kohle, O., Graetzel, M., Meyer, A.F. and Meyer, T.B., Advanced Materials, 1997, 9(11), 904.
6. Schmidt-Mende, L., Fechtenkötter, A., Müllen, K., Moons, E., Friend, R. H., and MacKenzie, J. D., “Self-Organized Discotic Liquid Crystals for High-Efficiency Organic Photovoltaics”, Sci ence 293 (5532), 1119. (2001)
7. Sergeyev, S., Pisula, W. and Geerts, Y.-H., “Discotic liquid crystals: a new generation of organic semiconductors”, Chemical Society Reviews, 36, 19021929 (2007)
8. Grelet, E., Bock, H., “Control of the orientation of thin open supported columnar liquid crystal films by the kinetics of growth”, Europhys. Lett. 73, 712718 (2006).
9. Thiebaut, O., Bock, H., Grelet, E., “Face-on oriented bilayers of two discotic columnar liquid crystals for organic donor-acceptor hetreojunction”, J. Am. Chem. Soc. 132, 68866887 (2010).
10. Steinhart, M., Zimmermann, S., Golring, P., Schaper, A. K., Golsele, U., Weder, C., and Wendorff, J. H., “Liquid Crystalline Nanowires in Porous Alumina: Geometric Confinement versus Influence of Pore Walls”, Nano Letters, 5, 429434 (2005)
11. Rutar, V., Blinc, R., Vilfa, M., “ 13C NMR study of molecular ordering in a discotic columnar mesophase”, J. Physique 43 761765 (1982)
12. Dvinskikh, Sergey V., Sandstrom, Dick, Zimmermann, Herbert, Maliniak, Arnold, Carbon-13 NMR spectroscopy applied to columnar liquid crystals, Progress in Nuclear Magnetic Resonance Spectroscopy, 48, 85107 (2006)
13. Charlet, E., Grelet, E., “Anisotropic light absorption, refractive indices and orientational order parameter of unidirectionally aligned columnar liquid crystal filmsPhys. Rev. E 78, 041707 (2008).



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