Multiple Levels of Order in Linked Disc-Rod Liquid Crystals

Angewandte Chemie - International Edition

Volumn 42, Issue 48, 2003, Pages 6015-6018

  Kouwer, Paul H J ^a   Mehl, Georg H ^a  

^a UNIVERSITY OF HULL   (United Kingdom)

Author keywords

Liquid crystals; Mesophases; Nanostructures; Self assembly

Indexed keywords

NANOSTRUCTURED MATERIALS; NEMATIC LIQUID CRYSTALS; PHASE SEPARATION;

SUPERMOLECULAR SYSTEMS;

SMECTIC LIQUID CRYSTALS;

TERPHENYL DERIVATIVE;

ARTICLE; CRYSTAL STRUCTURE; LIQUID CRYSTAL; MOLECULAR INTERACTION; NANOPARTICLE; PHASE TRANSITION; REACTION ANALYSIS; STRUCTURE ANALYSIS; SYNTHESIS;

EID: 0347355109     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200352488     Document Type: Article

References (24)

1. a) For a review on polycatenars: H. T. Nguyen, C. Destrade, J. Malthête in Handbook of Liquid Crystals, Vol. 2B (Eds.: D. Demus, J. W. Goodby, G. W. Gray, H. W. Spiess, V. Vill), Wiley VCH, Weinheim, 1998, pp. 865-885;
2. b) A. M. Giroud-Godquin, P. M. Maitlis, Angew. Chem. 1991, 103, 370; Angew. Chem. Int. Ed. Engl. 1991, 30, 375, and references therein.
3. b) A. M. Giroud-Godquin, P. M. Maitlis, Angew. Chem. 1991, 103, 370; Angew. Chem. Int. Ed. Engl. 1991, 30, 375, and references therein.
4. For a review on nonconventional mesophases resulting from strong intermolecular interactions: C. Tschierske, J. Am. Chem. Soc. 2003, 125, 10977, and references therein.
5. a) R. M. Richardson, S. A. Ponomarenko, N. I. Boiko, V. P. Shibaev, Liq. Cryst. 1999, 26, 101;
6. b) M. Marcos, R. Giménez, J. L. Serrano, B. Donnio, B. Heinrich, D. Guillon, Chem. Eur. J. 2001, 7, 1006, and references therein;
7. c) R. Elsäßer, G. H. Mehl, J. W. Goodby, D. J. Photinos, Chem. Commun. 2000, 851.
8. L phase is published
9. b) K. Ohta, H. Muroki, A. Takagi, K. Hatada, H. Ema, I. Yamamoto, K. Matsuzaki, Mol. Cryst. Liq. Cryst. 1986, 140, 131.
10. Highly ordered smectic phases have been reported for a macromolecular samples with strong backbone interactions: D. Janietz, R. Festag, C. Schmidt, J. H. Wendorff, Liq. Cryst. 1996, 20, 459.
11. Previously prepared linked disc-rod mesogens: a) W. Kreuder, H. Ringsdorf, O. Herrmann-Schönherr, J. H. Wendorff, Angew. Chem. 1987, 99, 1300; Angew. Chem. Int. Ed. Engl. 1987, 26, 1249;
12. Previously prepared linked disc-rod mesogens: a) W. Kreuder, H. Ringsdorf, O. Herrmann-Schönherr, J. H. Wendorff, Angew. Chem. 1987, 99, 1300; Angew. Chem. Int. Ed. Engl. 1987, 26, 1249;
13. b) I. D. Fletcher, G. R. Luckhurst, Liq. Cryst, 1995, 18, 175;
14. c) J. J. Hunt, R. W. Date, B, A. Timimi, G. R. Luckhurst, D. W. Bruce, J. Am. Chem. Soc. 2001, 123, 10115;
15. d) P. H. J. Kouwer, G. H. Mehl, J. Am. Chem. Soc. 2003, 125, 11172.
16. e) P. H. J. Kouwer, G. H. Mehl, Mol. Cryst. Liq. Cryst. 2003, 397, 301.
17. 2. Exact values depend on side groups and the exact organization of the mesogens in the layers.
18. a) P. H. J. Kouwer, W. F. Jager, W. J. Mijs, S. J. Picken, Macromolecules 2002, 35, 4322;
19. b) C. C. Dong, M. Hird, J. W. Goodby, P. Styring, K. J. Toyne, Ferroelectrics 1996, 180, 245.
20. Also mesogens with incompatible submolecular units (e.g. with siloxane or fluoroalkyl groups) often show microphase segregation. In these systems the phase segregation is already observed in the isotropic phase.
21. 001 = 101.9, 51.4, 34.0 and 26.0 Å.
22. a) Note that the thickness of both the disc and rod layers are estimated after calculating the (sub)molecular dimensions by molecular modeling software.
23. b) P. G. de Gennes, J. Prost in The Physics of Liquid Crystals, 2nd ed., Oxford University Press, New York, 1993, p. 528.
24. 2 phase transitions and, hence, the transitions are assigned to phase transitions predominantly localized in the rod-layer.