1. Open Access Kent State
  2. 8. Hybrid Calamitic and Bent-core Dimeric Mesogens and Their Biaxial SmA 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 1 exhibited the biaxial smectic A(SmA) phase and dimer 2 exhibited a highly ordered mesophase below the nematic (N) phase. Two rodlike 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
2012-01-01
Publication Title
Journal of Materials Chemistry
Volume
22
Issue
38
First Page
20363
Last Page
20367
Subject
Community
Department of Physics
Permalink https://oaks.kent.edu/article/8-hybrid-calamitic-and-bent-core-dimeric-mesogens-and-their-biaxial-sma-and-nematic-phases
Wang, Y., Yoon, H., Bisoyi, H., Kumar, S., & Li, Q. (2012). 8. Hybrid Calamitic and Bent-core Dimeric Mesogens and Their Biaxial SmA and Nematic Phases. Journal of Materials Chemistry. https://doi.org/10.1039/c2jm34315k
Wang, Y., Hyung Yoon, Hari Bisoyi, Satyendra Kumar, and Q. Li. 2012. “8. Hybrid Calamitic and Bent-Core Dimeric Mesogens and Their Biaxial SmA and Nematic Phases”. Journal of Materials Chemistry. https://doi.org/10.1039/c2jm34315k.
Wang, Y., H. Yoon, H. Bisoyi, S. Kumar, and Q. Li. 8. Hybrid Calamitic and Bent-Core Dimeric Mesogens and Their Biaxial SmA and Nematic Phases. Journal of Materials Chemistry, 1 Jan. 2012, doi:10.1039/c2jm34315k.