Dielectric studies of tetraethylene glycol-bis(3-methylimidazolium) dichloride (TEGDC) exhibiting large negative dielectric anisotropy

Yakuphanoglu F., Okutan M., Koysal O., Ozder S., Ocakoglu K., Iclı S.

JOURNAL OF PHYSICAL CHEMISTRY B, vol.109, pp.24338-24342, 2005 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 109
  • Publication Date: 2005
  • Doi Number: 10.1021/jp054515u
  • Journal Name: JOURNAL OF PHYSICAL CHEMISTRY B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.24338-24342
  • Yıldız Technical University Affiliated: No

Abstract

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 is an element of) 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.