Synthesis and smectogenic properties of novel phloroglucinol-based star-shaped liquid crystals containing three peripheral alkyloxylated Schiff base arms

Yew Hong Ooi, Guan Yeow Yeap*, Chun Chieh Han, Hong-Cheu Lin, Kenji Kubo, Masato M. Ito

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A series of symmetrical trimeric liquid crystalline compounds of which the molecular structure with a central core of 1,3,5-benzene attached by three rod-like mesogenic Schiff base moieties via the propylene spacers and ether linkages has successfully been synthesised and characterised by infra red and nuclear magnetic resonance spectroscopic techniques. All the star-shaped compounds in this series exhibit predominantly SmC phase except the analogue possessing terminal C8H17 group. It is apparent that the members with even parity from C10H21 to C16H33 show enantiotropic SmC phase while the member with longest terminal chain of C18H37 is inclined to monotropic smectogen. The X-ray diffraction measurements reveal that the tilted smectic layer structures of the SmC phase are confirmed to have an obvious sharp peak at small angles of 2θ ~ 1.03°-1.48° with d-spacing values of 4.01-4.58 nm, which are corresponding to tilt angles of ~48° in the SmC phase.

Original languageEnglish
Pages (from-to)516-527
Number of pages12
JournalLiquid Crystals
Volume40
Issue number4
DOIs
StatePublished - 1 Apr 2013

Keywords

  • phloroglucinol
  • Schiff bases
  • smectic C
  • star-shaped liquid crystals
  • XRD

Fingerprint Dive into the research topics of 'Synthesis and smectogenic properties of novel phloroglucinol-based star-shaped liquid crystals containing three peripheral alkyloxylated Schiff base arms'. Together they form a unique fingerprint.

Cite this