Dielectric Studies of Tetraethylene Glycol−Bis(3-methylimidazolium) Dichloride (TEGDC) Exhibiting Large Negative Dielectric Anisotropy
Makaleler > Tam Makale · 2005
Yazarlar: F. Yakuphanoglu, M. Okutan, O. Köysal, S. Özder, K. Ocakoǧlu, S. İçli
The Journal of Physical Chemistry B, Uluslararası, Wos, 2005, cilt 109, ss 24338-24342
DOI: 10.1021/jp054515u
Özet
A dielectric anisotropy property of a TEGDC (tetraethylene glycol-bis(3-methylimidazolium) dichloride) is investigated as a function of frequency. TEGDC showed an extremely large negative dielectric anisotropy (-10.95 to -4753.73). Variation of dielectric anisotropy (delta epsilon) with respect to the spot frequencies reveals that liquid crystal (LC) orientation has an n-type property at low frequencies and as the frequency increases dielectric anisotropy character shifts from negative dielectric anisotropy type (n-type) to positive dielectric anisotropy type (p-type). Consequently, the TEGDC is a liquid crystal with large negative dielectric anisotropy.