Cooperative chirality in columnar liquid crystals: Studies of fluxional octahedral metallomesogens

Journal of the American Chemical Society

Volumn 121, Issue 18, 1999, Pages 4518-4519

  Trzaska, Scott T ^a   Hsu, Hsiu Fu ^a   Swager, Timothy M ^a  

^a MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

METAL;

ARTICLE; CHIRALITY; CONFORMATION; CRYSTAL STRUCTURE; LIQUID CRYSTAL; MOLECULAR DYNAMICS; MOLECULAR STABILITY;

EID: 0033549081     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9900609     Document Type: Article

References (19)

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2. (a) Nuckolls, C.; Katz, T. J. J. Am. Chem. Soc. 1998, 120, 9541.
3. (b) van Nostrum, C. F.; Bosmam, A. W.; Gelinck, G. H.; Schouten, P. G.; Warman, J. M.; Kentgens, A. P. M.; Devillers, M. A. C.; Meijerink, A.; Picken, S. J.; Sohling, U.; Schouten A.-J.; Nolte, R. J. M. Chem.-Eur. J. 1995, 1, 171.
4. (c) Maltete, J.; Jacques, J.; Tinh, H. N.; Destrade, C. Nature 1982, 29, 46.
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8. (d) Bock, H. Helfrich, W. Liq. Cryst. 1995, 18, 387.
9. Verbiest, T.; Elshocht, S. V.; Kauranen, M.; Hellemans, L.; Snauwaert, J.; Nuckolls, C.; Katz, T. J.; Persoons, A. Science 1998, 282, 913.
10. (a) Zheng, H.; Swager, T. M. J. Am. Chem. Soc. 1994, 116, 761.
11. (b) Swager, T. M.; Zheng, H. Mol. Cryst. Liq. Cryst. 1995, 260, 301.
12. (c) Zheng, H. Ph.D. Dissertation, University of Pennsylvania, 1995.
13. These liquid-crystal phases were previously labeled with a different nomenclature (ref 5). Col is currently the preferred designation.
14. Cristallographic analysis of the methoxy analogue of 1d (see Supporting Information) indicates that the complexes stack in enantiomerically pure columns.
15. Recent studies of discoid molecules have also established the preference for a single chiral conformer in a columnar stack: Palmans, A. R. A.; Vekemans, J. A. J. M.; Havinga, E. E.; Meijer, E. W. Angew. Chem., Int. Ed. Engl. 1997, 36, 2648.
16. 3+ analogue, 1c, was previously shown (ref 5) to display large textural changes. In all cases, the phase assignment is supported by low-angle X-ray diffraction.
17. The interdigitation and fluctuations of side chains in a helical hexagonal system will produce frustration, which may give rise to a three-column superlattice. Fontes, E.; Heiney, P. A.; de Jeu, W. H. Phys. Rev. Lett. 1988, 61, 1202.
18. Trzaska, S. T.; Zheng, H.; Swager, T. M. Chem. Mater. 1999, 11, 130.
19. Trzaska, S. T. Ph.D. Dissertation, University of Pennsylvania, 1998.