Probing the texture of the calamitic liquid crystalline dimer of 4-(4-Pentenyloxy)benzoic acid

Maher A. Qaddoura, Kevin D. Belfield

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The liquid crystalline dimer of 4-(4-pentenyloxy)benzoic acid, a member of the n-alkoxybenzoic acid homologous series, was synthesized using potassium carbonate supported on alumina as catalyst. The acid dimer complex exhibited three mesophases; identified as nematic, smectic X1 and smectic X2. Phase transition temperatures and the corresponding enthalpies were recorded using differential scanning calorimetry upon both heating and cooling. The mesophases were identified by detailed texture observations by variable temperature polarized light microscopy. The nematic phase was distinguished by a fluid Schlieren texture and defect points (four and two brushes) while the smectic phases were distinguished by rigid marble and mosaic textures, respectively

Original languageEnglish (US)
Pages (from-to)827-840
Number of pages14
JournalMaterials
Volume3
Issue number2
DOIs
StatePublished - 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • Liquid crystalline texture
  • Nematic phase
  • Smectic phase

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