Liquid Crystallinity of Unsymmetrical Ferrocene Derivatives (I) Synthesis of Unsymmetrically 1,1′-Disubstituted Ferrocene Derivatives and their Phase Transition Behavior
作者:
Tomonori Hanasaki,
Keishi Matsushita,
Tokiko Watanabe,
Satomi Enomoto,
Yuta Sato,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 351,
issue 1
页码: 103-110
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023258
出版商: Taylor & Francis Group
关键词: unsymmetrical ferrocene derivative;liquid crystal;phase transition;metallomesogen
数据来源: Taylor
摘要:
A new series of unsymmetrically 1,1′-disubstituted ferrocene derivatives, 1-[4′-(4-substitutedbenzoyloxy)biphenyl-4-oxycarbonyl]-1′-alkoxycarbonylferrocene, was prepared and their phase transition behavior was studied by a differential scanning calorimeter and a polarizing microscope. Some structural parameters, such as the length of the alkyl chain and the nature of the terminal substituent, have been modified. In the case of no substituent at a terminal position of the mesogenic group, the derivative showed no liquid crystallinity. Monotropic liquid crystalline phases were observed for the derivatives having a polar terminal group. The compounds with a flexible alkoxy chain as the terminal group gave rise to an enantiotropic nematic phase.
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