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Issue 9, 2017
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The effect of chain length in terminal groups on the mesomorphic behavior of novel (−)-menthol-based chiral liquid crystal compounds with a blue phase

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Abstract

In this study, two series of novel chiral liquid crystal compounds derived from (−)-menthol with different lengths of alkyl or alkoxy as terminal groups were successfully synthesized. Their chemical structure and liquid crystal properties were investigated by various experimental techniques. Series I, except for compound If, exhibits monotropic properties and the whole series II shows enantiotropic mesogenic properties. Both series I and series II display a platelet texture of a BP and a focal conic texture of an N* phase upon cooling. In addition, series II displays an iridescent oily streak texture along with selective reflection upon heating. The selective reflection wavelengths of series II shift to a shorter wavelength region with increasing temperature in the N* phase. For both series I and series II, a pronounced odd–even effect on the clearing temperature is observed when the parity of the terminal chain is varied. Series I with an odd number of terminal chains and series II with an even number have better order.

Graphical abstract: The effect of chain length in terminal groups on the mesomorphic behavior of novel (−)-menthol-based chiral liquid crystal compounds with a blue phase

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Publication details

The article was received on 10 Jan 2017, accepted on 07 Apr 2017 and first published on 07 Apr 2017


Article type: Paper
DOI: 10.1039/C7NJ00099E
Citation: New J. Chem., 2017,41, 3677-3686
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    The effect of chain length in terminal groups on the mesomorphic behavior of novel (−)-menthol-based chiral liquid crystal compounds with a blue phase

    C. Luo, Y. Jia, B. Sun and F. Meng, New J. Chem., 2017, 41, 3677
    DOI: 10.1039/C7NJ00099E

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