Phase behavior of some mono-substituted ferrocene- and [3]ferrocenophane- containing nematics with the cyclohexane ring in the rigid core

So Yeon Kim, Oleg N. Kadkin, Eun Ho Kim, Moon Gun Choi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Generally, incorporation of the cyclohexane rings into the rigid core of rod-like mesogens leads to improved technological parameters, i.e. low viscosity, ambient transition temperatures and stability of the nematic state. Taking this into consideration, a series of novel cyclohexane-containing derivatives of ferrocene has been synthesized. The effect of various structural factors on liquid crystalline behavior of the synthesized ferrocene-containing nematics has been examined. Ferrocenophane compounds exhibited enhanced liquid crystalline properties in comparison with the derivatives of unbridged ferrocene. Depending on thermal prehistory of the samples, some of the synthesized ferrocenomesogens showed remarkable migration of the phase transition temperatures. In one case such behavior led to stabilization of the initially monotropic nematic mesophase in subsequent heating cycles. In another case, the phase transition shifts caused the lowering of the crystal-to-nematic transition temperature and the broadening of the mesophase range. There was also a case of alteration from the initially enantiotropic to monotropic behavior. The obtained novel metallomesogens are important footsteps toward the development of low-viscous and low-temperature materials for liquid crystal applications possessing a chromophoric, redox-switchable, polarizable and chemically stable superaromatic ferrocene unit.

Original languageEnglish
Pages (from-to)2429-2437
Number of pages9
JournalJournal of Organometallic Chemistry
Volume696
Issue number11-12
DOIs
Publication statusPublished - 2011 Jun 1

Fingerprint

Phase behavior
Cyclohexane
cyclohexane
Superconducting transition temperature
Transition Temperature
transition temperature
rings
Phase Transition
Phase transitions
Crystalline materials
Derivatives
Liquids
liquids
Liquid Crystals
Liquid crystals
ambient temperature
rods
Stabilization
stabilization
liquid crystals

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Kim, So Yeon ; Kadkin, Oleg N. ; Kim, Eun Ho ; Choi, Moon Gun. / Phase behavior of some mono-substituted ferrocene- and [3]ferrocenophane- containing nematics with the cyclohexane ring in the rigid core. In: Journal of Organometallic Chemistry. 2011 ; Vol. 696, No. 11-12. pp. 2429-2437.
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Phase behavior of some mono-substituted ferrocene- and [3]ferrocenophane- containing nematics with the cyclohexane ring in the rigid core. / Kim, So Yeon; Kadkin, Oleg N.; Kim, Eun Ho; Choi, Moon Gun.

In: Journal of Organometallic Chemistry, Vol. 696, No. 11-12, 01.06.2011, p. 2429-2437.

Research output: Contribution to journalArticle

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