Fluoroalkane derivative and liquid crystal composition.

摘要

A fluoroalkane derivative represented by the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="18" wi="146" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R denotes an alkyl group having 1 -16 carbon atoms, C<Sup>*</Sup> denotes an asymmetric carbon atom, R' denotes an alkyl or alkoxy group having 1 -16 carbon atoms;
<Chemistry id="chema02" num="0002"><Image id="ia02" he="10" wi="63" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>respectively denote a phenylene group
<Chemistry id="chema03" num="0003"><Image id="ia03" he="8" wi="23" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>a cyclohexylene group
<Chemistry id="chema04" num="0004"><Image id="ia04" he="8" wi="20" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>or a pyrimidinylene group
<Chemistry id="chema05" num="0005"><Image id="ia05" he="11" wi="28" file="IMGA0005.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>p is 0 or 1, q is 0 or 1 when p is 1, r is 0 or 1; and I, m and n are respectively 0 or a positive integer <!-- EPO <DP n="2"> -->satisfying the relationship of l + m + n ≧ 1. The fluoroalkane derivative has a fluorine atom providing a large dipole moment and directly connected to an asymmetric carbon atom, so that it provides a high speed responsive characteristic through an increased spontaneous polarization when contained in a liquid crystal - composition, especially a ferroelectric liquid crystal composition.