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Int. J. Mol. Sci. 2015, 16(4), 7520-7534; doi:10.3390/ijms16047520

A New Series of Kinked Liquid Crystals: 2-(6-Alkoxynaphthalen-2-yl)-6-methoxyquinolines

Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Qinghua Qin
Received: 12 February 2015 / Revised: 26 March 2015 / Accepted: 26 March 2015 / Published: 2 April 2015
(This article belongs to the Special Issue Advances in Anisotropic and Smart Materials)
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Abstract

A new series of 2-(6-alkoxynaphthalen-2-yl)-6-methoxyquinolines (nO-NpQOMe, n = 3–8) liquid crystal compounds, a linear molecular structure with two kinks, were synthesized using a short two-step reaction with overall yields between 43% and 58%. Spectral analyses were in accord with the expected structures. Thermotropic behavior of these liquid crystal compounds were investigated using polarized optical microscopy and differential scanning calorimetry. All compounds exhibited purely enantiotropic nematic phase at the medium–high temperature range of 162.4–234.2 °C. However, short ranges of nematic phase, 20.5–16.6 °C at heating and 46.7–37.0 °C at cooling, were observed in these linear liquid-crystalline compounds with two kinks. View Full-Text
Keywords: liquid crystals; kinked mesogen; synthesis; thermotropic behavior liquid crystals; kinked mesogen; synthesis; thermotropic behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chia, W.-L.; Liu, C.-W. A New Series of Kinked Liquid Crystals: 2-(6-Alkoxynaphthalen-2-yl)-6-methoxyquinolines. Int. J. Mol. Sci. 2015, 16, 7520-7534.

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