
Proceedings Paper
The aggregation structures of Ia3d and Im3m cubic phases formed by rod-shaped mesogens ANBC and BABHFormat | Member Price | Non-Member Price |
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Paper Abstract
This article focuses on thermotropic cubic phases with bicontinuous type constructed by rod-shaped molecules such as
4'-n-alkoxy-3'-nitrobiphenyl-4-carboxylic acid (ANBC) and 1,2-bis
(4'-n-alkoxybenzoyl)hydrazine (BABH). Their phase
diagrams as functions of temperature and terminal alkyl chain length were fully established. The common feature of the
two series is the Ia3d to Im3m to Ia3d phase sequence on lengthening the terminal chains. The formations are usually
understood in analogy with lyotropic cases, but one of the highlighted differences is the structure of the Im3m phase. The
structure contains two types of aggregates, spherical shells and a
3-by-3 network, within a lattice. The presence of the
two distinguished sites in their dynamically ordered structure is very surprising. Another interesting point in their phase
diagram is the Ia3d phase region, which is separated into two. The structures of the two Ia3d regions were also
investigated. It was revealed that the network is composed of central core parts of the constituent molecules in both chain
regions. This is another interesting feature probably only observed in thermotropic system because in the case of
lyotropic system a replacement of location between the two chemically incompatible parts is usually observed. Analogies
and differences between the thermotropic and lyotropic cubic phases are discussed.
Paper Details
Date Published: 17 August 2010
PDF: 9 pages
Proc. SPIE 7775, Liquid Crystals XIV, 777506 (17 August 2010); doi: 10.1117/12.859227
Published in SPIE Proceedings Vol. 7775:
Liquid Crystals XIV
Iam Choon Khoo, Editor(s)
PDF: 9 pages
Proc. SPIE 7775, Liquid Crystals XIV, 777506 (17 August 2010); doi: 10.1117/12.859227
Show Author Affiliations
Shoichi Kutsumizu, Gifu Univ. (Japan)
Kazuya Saito, Univ. of Tsukuba (Japan)
Published in SPIE Proceedings Vol. 7775:
Liquid Crystals XIV
Iam Choon Khoo, Editor(s)
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