The influences of lateral groups on 4-cyanobiphenyl-benzonitrile- based dimers
- Title
- The influences of lateral groups on 4-cyanobiphenyl-benzonitrile- based dimers
- Creator
- Srinatha M.K.; Zeba A.; Ganjiwale A.; Gowda A.; Hegde G.; Alaasar M.; Shanker G.
- Description
- Cyanobiphenyl-based compounds are known to display RT or low melting liquid crystals in a single-component system or composites. Herein, we discuss the influence of laterally substituted groups (-CN, -F, -H) on 4-[?-(4-cyanobiphenyl-4-yloxy)alk-1-yloxy]benzonitrile. Three series of new dimers were synthesised by using 4-cyano-4-hydroxybiphenyl connected via flexible spacers with different number of carbon atoms to 4-hydroxyphthalonitrile/ 2-fluoro-4-hydroxy benzonitrile/ 4-hydroxy benzonitrile. Their self-assembly in LC phases assessed by polarising optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction studies, and their behaviours are compared with related non-substituted (-H) model compound. UV-Visible and fluorescent experiments confirm the strong aggregation, the intensities of emission decrease as we move from CN?F?H substitutions. A representative dimer from each series covering the aspect of polarity and flexibility have been simulated using 1000 minimisation steepest descent and CHARMM force filed to examine their self-assembly. This work helps to understand the influence of lateral groups, connecting spacers on the LC behaviour of dimers. 2022 Informa UK Limited, trading as Taylor & Francis Group.
- Source
- Liquid Crystals, Vol-49, No. 2, pp. 217-229.
- Date
- 2022-01-01
- Publisher
- Taylor and Francis Ltd.
- Subject
- aggregation; cyanobiphenyl; dimers; fluorescence; Liquid crystals; molecular dynamic simulation; nematic phase
- Coverage
- Srinatha M.K., Department of Chemistry, Bangalore University, Jnana Bharathi Campus, Bangalore, India; Zeba A., Department of Life Science, Bangalore University, Jnana Bharathi Campus, Bangalore, India; Ganjiwale A., Department of Life Science, Bangalore University, Jnana Bharathi Campus, Bangalore, India; Gowda A., Raman Research Institute, C.V. Raman Avenue, Bangalore, India; Hegde G., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, India; Alaasar M., Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt; Shanker G., Department of Chemistry, Bangalore University, Jnana Bharathi Campus, Bangalore, India
- Rights
- Restricted Access
- Relation
- ISSN: 2678292; CODEN: LICRE
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Srinatha M.K.; Zeba A.; Ganjiwale A.; Gowda A.; Hegde G.; Alaasar M.; Shanker G., “The influences of lateral groups on 4-cyanobiphenyl-benzonitrile- based dimers,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/15451.