Synthesis, characterization and texture observations of calamitic liquid crystalline compounds

Maher A. Qaddoura, Kevin D. Belfield

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Several divinylic mesogenic monomers were synthesized based on coupling the monomer 4-(4-pentenyloxy)benzoic acid with chlorohydroquinone, 2,5-dihydroxyacetophenone, methylhydroquinone or 2-methoxyhydroquinone. This resulted in novel mesogens of phenylene esters with different lateral substituent groups. The effect of the lateral substituent group on the thermotropic phase behavior for these liquid crystalline compounds was investigated using DSC and optical polarized microscopy. All the mesogens proved to have a wide nematic liquid crystalline range. Only the phenylene ester, which has a methoxy lateral substituent, exhibited both nematic and smectic phases. Structural confirmation of all new derivatives was accomplished by 1H- and 13C-NMR spectroscopic analysis, along with CH elemental analysis.

Original languageEnglish (US)
Pages (from-to)4772-4788
Number of pages17
JournalInternational Journal of Molecular Sciences
Issue number11
StatePublished - Nov 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


  • Liquid crystalline texture
  • Nematic phase
  • Smectic phase


Dive into the research topics of 'Synthesis, characterization and texture observations of calamitic liquid crystalline compounds'. Together they form a unique fingerprint.

Cite this