3 G. Pelzl, S. Diele and W. Weissflog, Adv. Mater., 1999, 11, 707.
interaction of the terminal chains between the neighbouring layers.
Here, the question arises as to why the transition does not take place
for the field-induced B2 phase, but does so reversibly for the B7 phase.
We speculate that there is an easier transformation process in the B7
phase because of its polarization modulation structure.
4 H. Takezoe and Y. Takanishi, Jpn. J. Appl. Phys., 2006, 45, 597.
5 R. A. Reddy and C. Tschierske, J. Mater. Chem., 2006, 16, 907.
6 D. A. Olson, M. Veun, A. Cady, M. V. D’agostino, P. M. Johnson,
H. T. Nguyen, L. C. Chen and C. C. Huang, Phys. Rev. E: Stat.,
Nonlinear, Soft Matter Phys., 2001, 63, 041702.
7 C. Keith, R. A. Reddy, H. H. Lang and C. Tschierske, Chem.
Commun., 2004, 1898.
8 G. Dantgraber, A. Eremin, S. Diele, A. Hauser, H. Kresse, G. Pelzl
and C. Tschierske, Angew. Chem., Int. Ed., 2002, 41, 2408.
9 H. Nadasi, W. Weissflog, A. Eremin, G. Pelzl, S. Diele, B. Das and
S. Grande, J. Mater. Chem., 2002, 12, 1316.
10 J. P. Bedel, J. C. Rouillon, J. P. Maroerou, M. Lauerre, H. T. Nguyen
and M. F. Achard, Liq. Cryst., 2001, 28, 1285.
11 R. A. Reddy and B. K. Sadashiva, J. Mater. Chem., 2002, 12,
2627.
12 R. A. Reddy, M. W. Schroder, M. Boddyagin, H. Kresse, S. Diele,
G. Pezel and W. Weissflog, Angew. Chem., Int. Ed., 2005, 44, 774.
13 R. A. Reddy and B. K. Sadashiva, J. Mater. Chem., 2004, 14, 1936.
14 G. Pelzl, D. Diele, A. Jakli, C. H. Lischka, I. Wirth and W. Weissflog,
Liq. Cryst., 1999, 26, 135.
In summary, we prepared a bent-shaped molecule, in which
the dodecylthio tails and typical Schiff-based side wings are
substituted on a conventional phenyl central core. This molecule
forms the B7 in the temperature region from 117 to 142 ꢀC, which
shows the characteristic banana leaf and circular domain
textures, but is easily transformed to the B2 phase with a fan-
shaped texture by application of an electric field. The electric-
field-induced B2 phase appears with different ground states,
depending on the temperature. At higher temperatures, the B2
phase possesses a ferroelectric (SmCSPF) ground state, whereas
at lower temperatures the B2 phase shows an antiferroelectric
(SmCAPA) ground state. These two states transformed into each
other reversibly at 124 ꢀC under the applied field, while they are
stable over the mesophase temperature in the field-off state.
15 J. Thisayukta, T. Sekine, Y. Nakayama and J. Watanabe, Liq. Cryst.,
2000, 27, 1129.
16 J. P. Bedel, J. C. Rouillon, J. P. Marcerou, M. Laguerre,
H. T. Nguyen and M. F. Achard, J. Mater. Chem., 2002, 12, 2214.
17 H. N. S. Murthy and B. K. Sadashiva, Liq. Cryst., 2003, 30, 1051.
18 P. Pyc, J. Mieczkowski, D. Pociecha, E. Gorecka, B. Donnio and
D. Guillon, J. Mater. Chem., 2004, 14, 2374.
Acknowledgements
19 M. Nakata, D. R. Link, Y. Takanishi, Y. Takahasi, J. Thisayukta,
H. Niwano, D. A. Coleman, J. Watanabe, A. Iida, N. A. Clark and
H. Takezoe, Phys. Rev. E: Stat., Nonlinear, Soft Matter Phys.,
2005, 71, 011705.
20 G. Pelzl, M. G. Tamba, S. F-Tandel, M. W. Scroder, U. Baumeister,
S. Diele and W. Weissflog, J. Mater. Chem., 2008, 18, 3017.
21 D. A. Coleman, J. Fernsler, N. Chattham, M. Nakata, Y. Takanishi,
This research was supported by a Grant-in-Aid for Creative
Scientific Research and a Grant-in-Aid for Young Scientists B
(21750138) from the Ministry of Education, Culture, Sports,
Science and Technology in Japan.
€
E. Korblova, D. R. Link, R.-F. Shao, W. G. Jang, J. E. Maclennan,
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3618 | J. Mater. Chem., 2010, 20, 3615–3618
This journal is ª The Royal Society of Chemistry 2010