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| Titel: |
The effects of a second branched alkyl chain and double chiral centres on the phase transition and spontaneous polarization of a chiral smectic liquid crystal |
| Auteur: |
Yoshizawa, Atsushi Yokoyama, Akihisa Nishiyama, Isa |
| Verschenen in: |
Liquid crystals |
| Paginering: | Jaargang 11 (1992) nr. 2 pagina's 235-249 |
| Jaar: |
1992-02-01 |
| Inhoud: |
The effects of a second branched alkyl chain, lateral substitution, and double chiral centres on the phase transition and spontaneous polarization of the ferroelectric liquid crystal having a 2-methylalkanoyl group have been investigated. The introduction of another branched alkyl chain away from the 2-methylalkanoyl group causes a sharp SC*-SA transition peak and also enhances the ferroelectric properties in the SC* phase. Since the order within the layers is liquid-like in the SC* phase, the alkyl chain branching away from both the chiral centre and a polar group affects the overall motion of the molecule in the SC* phase. In the system of a compound with double chiral centres, the existence of the chiral centre in the 2-methylalkanoyl group affects the phase transition temperatures and the magnitude of the spontaneous polarization in the SC* phase. On the other hand, the existence of the chiral centre in the 2-methylbutyl group only affects the stability of a more highly ordered smectic phase appearing below the SC* phase. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 10 gevonden artikelen
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