1. Open Access Kent State
  2. Nonsymmetric bent-core liquid crystals based on a 1,2,4-thiadiazole core unit and their nematic mesomorphism
Author(s)
Abstract

The synthesis and thermotropic properties of novel V-shaped molecules having a central 1,3,4-thiadiazole core with a bend-angle of 160 are reported. The compounds consist of a shape-persistent oligo(phenylene ethynylene) scaffold with lateral alkyloxy substituents. One of the terminal aromatic units possesses an alkoxy chain capped by an ethyl ester group while the second terminus is a pyridyl group. They exhibit enantiotropic nematic phases and are characterized by polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction. Results from conoscopy indicate a biaxial nature of the nematic phase near room temperature. DFT calculations of dipole moments and molecular polarizabilities are used to substantiate the experimental findings.
Format
Article
Identifier(s)
10.1021/cm200643u
Publication Date
2011-01-01
Publication Title
Chemistry of Materials
Volume
23
First Page
2630
Last Page
2636
Keywords
Subject
Community
Department of Physics
Permalink https://oaks.kent.edu/phypubs/102
Seltmann, J., Marini, A., Mennucci, B., Dey, S., Kumar, S., & Lehmann, M. (2011). Nonsymmetric bent-core liquid crystals based on a 1,2,4-thiadiazole core unit and their nematic mesomorphism. Chemistry of Materials. https://doi.org/10.1021/cm200643u
Seltmann, Jens, Alberto Marini, B. Mennucci, Sonal Dey, Satyendra Kumar, and Matthias Lehmann. 2011. “Nonsymmetric Bent-Core Liquid Crystals Based on a 1,2,4-Thiadiazole Core Unit and Their Nematic Mesomorphism”. Chemistry of Materials. https://doi.org/10.1021/cm200643u.
Seltmann, J., A. Marini, B. Mennucci, S. Dey, S. Kumar, and M. Lehmann. Nonsymmetric Bent-Core Liquid Crystals Based on a 1,2,4-Thiadiazole Core Unit and Their Nematic Mesomorphism. Chemistry of Materials, 1 Jan. 2011, doi:10.1021/cm200643u.