Polymerizable transition-metal-containing liquid crystals with thermally reactive 1,3-diene tails

Advanced Materials

Volumn 17, Issue 5, 2005, Pages 602-606

  Martin, Alexander G ^a   Harms, Sven ^a   Weigand, Wolfgang ^a   Gin, Douglas L ^b  

^a FRIEDRICH SCHILLER UNIVERSITY JENA   (Germany)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ADDITION REACTIONS; ANISOTROPY; CROSSLINKING; DIFFERENTIAL SCANNING CALORIMETRY; FREE RADICAL POLYMERIZATION; MICROSTRUCTURE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; OPTICAL MICROSCOPY; PHASE TRANSITIONS; PHOTOPOLYMERIZATION; REDOX REACTIONS; SYNTHESIS (CHEMICAL); TRANSITION METALS; X RAY POWDER DIFFRACTION;

CYCLOADDITION; MESOGENS; REDOX ACTIVE METAL CENTERS; THERMAL POLYMERIZATION;

THERMOTROPIC LIQUID CRYSTALS;

EID: 16244408064     PISSN: 09359648     EISSN: None     Source Type: Journal    
DOI: 10.1002/adma.200400996     Document Type: Article

References (21)

1. D. W. Bruce, in Inorganic Materials (Eds: D. W. Bruce, D. O'Hare), Wiley, Chichester, UK 1996, Ch. 8.
2. Metallomesogens: Synthesis, Properties, and Applications (Ed: J. L. Serrano), VCH, Weinheim, Germany 1996.
3. K. Akagi, H. Goto, H. Bannai, G. Piao, H. Shirakawa, Synth. Met. 1997, 86, 1879.
4. L. Oriol, J. L. Serrano, Adv. Mater. 1995, 7, 348.
5. J. F. van der Pol, E. Neeleman, J. C. van Miltenburg, J. W. Zwikker, R. J. M. Nolle, W. Drenth, Macromolecules 1990, 23, 155.
6. L. Marcot, P. Maldivi, J.-C. Marchon, D. Guillon, M. Ibn-Elhaj, D. J. Broer, G. N. Mol, Chem. Mater. 1997, 9, 2051.
7. R. Deschenaux, F. Turpin, D. Guillon, Macromolecules 1997, 30, 3759.
8. M. Cano, L. Oriol, M. Piñol, J. L. Serrano, Chem. Mater. 1999, 11, 94.
9. M. Lee, Y.-S. Yoo, M.-G. Choi, Macromolecules 1999, 32, 2777.
10. B. P. Hoag, D. L. Gin, Macromolecules 2000, 33, 8549.
11. B. A. Pindzola, B. P. Hoag, D. L. Gin, J. Am. Chem. Soc. 2001, 123, 4617.
12. A. C. Sentman, D. L. Gin, Angew. Chem. Int. Ed. 2003, 42, 1815.
13. Cycloaddition crosslinking of bis(1,3-diene) LC monomers is believed to occur via the [4 + 2] reaction of one 1,3-diene unit with a single olefin moiety of an adjacent diene unit, leaving an unused olefin group available for further [4 + 2] reaction with other adjacent 1,3-dienes. The cyclic mono-olefin formed in the reaction may also undergo a [4 + 2] reaction with adjacent diene units. See references [10] and [12].
14. C. P. Roll, A. G. Martin, H. Görls, G. Leibeling, D. Guillon, B. Donnio, W. Weigand, J. Mater. Chem. 2004, 14, 1722.
15. R. Saumweber, C. Robl, W. Weigand, Inorg. Chim. Acta 1998, 269, 83.
16. The samples all show fan-shaped textures with strong unbroken boundaries, which is characteristic of a non-tilted SmA phase (see Supporting Information).
17. Several configurations are possible for smectic phases of bent mesogens, depending on whether the molecules are tilted or non-tilted in the layers; the orientation of the molecular dipoles within each layer (parallel or random); and the relationship between adjacent layers if the layers are polar: D. M. Walba, E. Körblova, R. Shao, J. E. Maclennan, D. E. Link, M. A. Glaser, N. A. Clark, in Anisotropic Organic Materials - Approaches to Polar Order (Eds: R. Glaser, P. Kaszynski), ACS, Washington, DC 2001, pp. 268-281.
18. SmA phases have been observed in organic bent-core mesogens: M. W. Schröder, S. Diele, N. Pancenko, W. Weissflog, G. Pelzl, J. Mater. Chem. 2002, 12, 1331.
19. G. Odian, Principles of Polymerization, 3rd ed., Wiley, New York 1991.
20. A. J. Gordon, R. A. Ford, The Chemist's Companion, Wiley, New York 1972.
21. R. M. Silverstein, G. C. Bassler, T. C. Morrill, Spectroscopic Identification of Organic Compounds, 5th ed., Wiley, New York 1991.