TY - JOUR
T1 - Odd-even behavior of ferroelectricity and antiferroelectricity in two homologous series of bent-core mesogens
AU - Lee, Seng Kue
AU - Heo, Sung
AU - Lee, Jong Gun
AU - Kang, Kyung Tae
AU - Kumazawa, Kazuya
AU - Nishida, Koushi
AU - Shimbo, Yoshio
AU - Takanishi, Yoichi
AU - Watanabe, Junji
AU - Doi, Takayuki
AU - Takahashi, Takashi
AU - Takezoe, Hideo
PY - 2005/8/10
Y1 - 2005/8/10
N2 - Two chiral bent-core mesogens Pn-O-PIMB(n- 2)* (n= 9 and 10) and their oxygen analogues Pn-O-PIMB(n - 2)*-(n - 4)O (n = 8, 9, and 10) with ω-[(S)-amyloxy]alkoxy terminal groups were prepared, and their phase structures were investigated by means of electro-optic, polarization reversal current and second harmonic generation measurements in order to clarify the effect of the interlayer steric interaction on the emergence of polar orderings. The odd-even behavior for the alternative appearance of ferroelectricity and antiferroelectricity was observed in two homologous series; the bent-core mesogens P10-O-PIMB8*, P8-O-PIMB6*-4O, and P10-O-PIMB8*-6O in addition to the previously reported P6-O-PIMB4* and P8-O-PIMB6*, where the length of chains n is even, exhibited ferroelectric phases. On the contrary, the mesogens P7-O-PIMB5*, P9-O-PIMB7*, and P9-O-PIMB7*-5O, where n is odd, showed antiferroelectric phases. It is obvious that the interlayer steric interaction plays a major role for the emergence of a variety of phase structures.
AB - Two chiral bent-core mesogens Pn-O-PIMB(n- 2)* (n= 9 and 10) and their oxygen analogues Pn-O-PIMB(n - 2)*-(n - 4)O (n = 8, 9, and 10) with ω-[(S)-amyloxy]alkoxy terminal groups were prepared, and their phase structures were investigated by means of electro-optic, polarization reversal current and second harmonic generation measurements in order to clarify the effect of the interlayer steric interaction on the emergence of polar orderings. The odd-even behavior for the alternative appearance of ferroelectricity and antiferroelectricity was observed in two homologous series; the bent-core mesogens P10-O-PIMB8*, P8-O-PIMB6*-4O, and P10-O-PIMB8*-6O in addition to the previously reported P6-O-PIMB4* and P8-O-PIMB6*, where the length of chains n is even, exhibited ferroelectric phases. On the contrary, the mesogens P7-O-PIMB5*, P9-O-PIMB7*, and P9-O-PIMB7*-5O, where n is odd, showed antiferroelectric phases. It is obvious that the interlayer steric interaction plays a major role for the emergence of a variety of phase structures.
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U2 - 10.1021/ja052315q
DO - 10.1021/ja052315q
M3 - Article
C2 - 16076216
AN - SCOPUS:23744477164
SN - 0002-7863
VL - 127
SP - 11085
EP - 11091
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 31
ER -