| abstract |
An exemplary embodiment of the present invention provides a compound represented by Chemical Formula 1: n nwherein, in Chemical Formula 1, n is 0, 1, or 2, and a substituent represented by X is F, Cl, CF 3 , CF 2 CF 3 CHF 2 , CH 2 F, OCF 3 , CN, NCS, or a C1 to C5 alkyl including 1 to 3 fluoro substituents and a CH 2 group independently substituted with one or more oxygen atoms; (R 1 ) is hydrogen or a C1 to C15 alkyl, at least one CH 2 group being independently replaced with —C≡C—, —CF 2 O—, —CH═CH—, —O—, —CO—O—, —O—CO—, or —O—CO—O— in a way that oxygen atoms are directly connected to each other, and 1 to 3 hydrogen atoms of the C1 to C15 alkyl being replaced with halogen; (F) indicates that a fluoro is optionally substituted in place of a hydrogen, andn neach ofn n nis independently |