Next Article in Journal
Dinitrogen and Related Chemistry of the Lanthanides: A Review of the Reductive Capture of Dinitrogen, As Well As Mono- and Di-aza Containing Ligand Chemistry of Relevance to Known and Postulated Metal Mediated Dinitrogen Derivatives
Next Article in Special Issue
Correction: Goto, H. et al. Liquid Crystalline π-Conjugated Copolymers Bearing a Pyrimidine Type Mesogenic Group. Materials 2009, 2, 22-37
Previous Article in Journal
Biphasic Calcium Phosphate Ceramics for Bone Regeneration and Tissue Engineering Applications
Previous Article in Special Issue
Carbon Nanotube-Reinforced Thermotropic Liquid Crystal Polymer Nanocomposites
Materials 2010, 3(2), 827-840; doi:10.3390/ma3020827

Probing the Texture of the Calamitic Liquid Crystalline Dimer of 4-(4-Pentenyloxy)benzoic Acid

1 and 1,2,*
Received: 22 December 2009 / Revised: 20 January 2010 / Accepted: 21 January 2010 / Published: 29 January 2010
(This article belongs to the Special Issue Liquid Crystals)
Download PDF [5055 KB, uploaded 29 January 2010]


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.
Keywords: liquid crystalline texture; nematic phase; smectic phase liquid crystalline texture; nematic phase; smectic phase
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
MDPI and ACS Style

Qaddoura, M.A.; Belfield, K.D. Probing the Texture of the Calamitic Liquid Crystalline Dimer of 4-(4-Pentenyloxy)benzoic Acid. Materials 2010, 3, 827-840.

View more citation formats

Article Metrics

For more information on the journal, click here


Cited By

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert