1. Open Access Kent State
  2. Hybrid Rod-like and Bent-core Liquid Crystal Dimers Exhibiting Biaxial Smectic A and Nematic Phases
Author(s)
Abstract

Liquid crystal hybrid dimers involving bent-core units and rod-like units were designed, synthesized and investigated by a combination of polarizing optical microscopy (POM),differential scanning calorimetry (DSC) and X-ray diffraction studies. All the four unsymmetrical dimers 1–4 exhibited stable nematic phases over a wide temperature range. Moreover, dimer 1exhibited the biaxial smectic A (SmA) phase and dimer 2 exhibited a highly ordered mesophase below the nematic (N) phase. Two rod-like and bent-core nematogenic units were covalently linked in dimers 3 and 4 to furnish exclusively the nematic phase. The observation of the biaxial SmA phase underlying the nematic phase in one of the bent-core–rod dimers 1 would be a significant step forward towards achieving the biaxial nematic phase and resolving controversies related to the presence of cybotactic groups.
Format
Article
Identifier(s)
10.1039/C2JM34315K
Publication Date
2012-09-11
Publication Title
Journal of Materials Chemistry
Volume
22
Issue
38
First Page
20363
Last Page
20367
Keywords
Subject
Rights
http://rightsstatements.org/vocab/InC/1.0/
Community
Department of Physics
Permalink https://oaks.kent.edu/article/hybrid-rod-and-bent-core-liquid-crystal-dimers-exhibiting-biaxial-smectic-and-nematic
Wang, Y., Yoon, H., Bisoyi, H., Kumar, S., & Li, Q. (2012). Hybrid Rod-like and Bent-core Liquid Crystal Dimers Exhibiting Biaxial Smectic A and Nematic Phases (1–). Journal of Materials Chemistry. https://doi.org/10.1039/C2JM34315K
Wang, Yan, Hyung Yoon, Hari Bisoyi, Satyendra Kumar, and Quan Li. 2012. “Hybrid Rod-Like and Bent-Core Liquid Crystal Dimers Exhibiting Biaxial Smectic A and Nematic Phases”. Journal of Materials Chemistry. https://doi.org/10.1039/C2JM34315K.
Wang, Yan, et al. Hybrid Rod-Like and Bent-Core Liquid Crystal Dimers Exhibiting Biaxial Smectic A and Nematic Phases. Journal of Materials Chemistry, 11 Sept. 2012, https://doi.org/10.1039/C2JM34315K.