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Proceedings Paper

Synthesis and physical properties of ferrocene derivatives XXIV: structural study of liquid crystalline mono-substituted ferrocene derivatives
Author(s): Naotake Nakamura; Kazuya Hiro; Kenjiro Uno
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Paper Abstract

Crystal structures of mono-substituted ferrocene derivatives,ω-[4-(4-methoxyphenoxycarbonyl)phenoxy]alkoxycarbonyl ferrocene (mMAF-n, n = 3-8, 11, where n is the number of carbon atoms in the alkyl spacer), are newly determined. The molecular structures of mMAF-n are divided into three groups; (i) a bent shape containing a doublegauche conformation (n = 2, 4, 6), (ii) a linear shape containing a kink (n = 3, 5, 7), and (iii) an extended linear shape adopting an all-trans conformation (n = 8, 11). The difference of the molecular shape between group (i) and (ii) is highly correlated with the parity of the number of carbon atoms in the alkyl spacer (odd-even effects). In both group (i) and (ii), the high entropic contribution of gauche conformations is introduced in the alkyl spacer, which is consistent with the non-liquid crystallinity of mMAF-n (n = 2-7). In group (iii), it is found out that there is a border at mMAF-8 on the mesomorphism of mMAF-n (n = 2-12).

Paper Details

Date Published: 17 August 2010
PDF: 8 pages
Proc. SPIE 7775, Liquid Crystals XIV, 77750O (17 August 2010); doi: 10.1117/12.860324
Show Author Affiliations
Naotake Nakamura, Ritsumeikan Univ. (Japan)
Kazuya Hiro, Toyobo Co., Ltd. (Japan)
Kenjiro Uno, Ritsumeikan Univ. (Japan)

Published in SPIE Proceedings Vol. 7775:
Liquid Crystals XIV
Iam Choon Khoo, Editor(s)

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