Synthesis and characterisation of novel rod-disc oligomers

Santanu Kumar Pal, Sandeep Kumar, Jhumur Seth

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Microwave-promoted synthesis of novel rufigallol-based liquid crystalline oligomers, containing six rod-like cyanobiphenyl moieties connected to the rufigallol core via flexible alkyl spacers, is reported. The synthesis of the target compounds was challenging since classical reactions failed to produce these oligomers. Differential scanning calorimetry and polarising optical microscopy analysis revealed the existence of a nematic phase with a shorter spacer and a smectic A (SmA) phase with a longer spacer. The compound with medium alkyl spacer exhibits both nematic and SmA phases at higher temperature and a re-entrant nematic phase at lower temperature.

Original languageEnglish
Pages (from-to)521-525
Number of pages5
JournalLiquid Crystals
Volume35
Issue number5
DOIs
StatePublished - May 2008
Externally publishedYes

Keywords

  • Biaxial nematic
  • Rod-disc oligomer
  • Rufigallol-based oligomer

Fingerprint

Dive into the research topics of 'Synthesis and characterisation of novel rod-disc oligomers'. Together they form a unique fingerprint.

Cite this