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http://hdl.handle.net/2289/7099
Title: | Novel electron-deficient phenanthridine based discotic liquid crystals |
Authors: | Yuvaraj, A.R. Renjith, Anu Kumar, Sandeep |
Keywords: | Discotic liquid crystals Pictet-Spengler Hetero-polycyclic Mesophase Conductivity |
Issue Date: | 15-Dec-2018 |
Publisher: | Elesvier B.V. |
Citation: | Journal of Molecular Liquids, 2018, Vol. 272, p583-589 |
Abstract: | Nitrogen-containing polycyclic core 5-phenylnaphtho[1,2,3,4-lmn] phenanthridine and its nitro-functionalized positional isomers were synthesized using Pictet-Spengler reaction between hexaalkoxytriphenylene-1-amine and various aryl aldehydes. The hexagonal columnar phase was observed in all the synthesized novel compounds. Mesomorphic characterization was carried out using conventional thermal analysis and X-ray diffraction techniques. These compounds showed room temperature liquid crystal phase and there is no crystalline phase observed even at −20 °C upon cooling from the isotropic temperature. Further, the long range of mesophase was confirmed by polarizing optical microscopy. Subsequently, charge transfer complexes were prepared by mixing the synthesized polycyclic hetero-aromatic compounds with 2,3,6,7,10,11-hexakis(octyloxy)-triphenylene. In UV–Vis absorption spectra, a redshift was found for the charge transfer complexes; which confirmed the interaction between donor-acceptor counterparts. The electrical conductivity of the charge transfer complexes and their pure target compounds was measured. |
Description: | Restricted Access |
URI: | http://hdl.handle.net/2289/7099 |
ISSN: | 0167-7322 |
Alternative Location: | https://doi.org/10.1016/j.molliq.2018.09.120 |
Copyright: | 2018 Elsevier B.V. |
Appears in Collections: | Research Papers (SCM) |
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2018_Journal of Molecular Liquids_Vol.272_p583-589.pdf Restricted Access | Restricted Access | 1.35 MB | Adobe PDF | View/Open Request a copy |
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