Issue 10, 2014

2-Methoxypyridine derivatives: synthesis, liquid crystalline and photo-physical properties

Abstract

We herein report the design and synthesis of fourteen new bent shaped luminescent mesogens carrying a pyridine core substituted with various polar groups. They possess a slightly non-planar bent conformation with various intermolecular interactions, as evidenced by their single crystal X-ray diffraction study, and exhibit an ambient to elevated temperature liquid crystalline phase (N or Colr), which has been confirmed by differential scanning calorimetry, polarized optical microscopy, and powder X-ray diffraction techniques. In these compounds, the nature of polar substituents influences significantly the formation of the mesophase over a wide thermal range. The appearance of the nematic phase is due to the presence of the lateral CN group attached to the pyridine core and the terminal F or Cl substituent. The formation of a rectangular columnar phase is attributed to the absence of the lateral CN group in the pyridine core and the presence of the terminal Br, NO2 or 4-pyridyl group.

Graphical abstract: 2-Methoxypyridine derivatives: synthesis, liquid crystalline and photo-physical properties

Supplementary files

Article information

Article type
Paper
Submitted
04 Jun 2014
Accepted
01 Aug 2014
First published
04 Aug 2014

New J. Chem., 2014,38, 5018-5029

Author version available

2-Methoxypyridine derivatives: synthesis, liquid crystalline and photo-physical properties

A. T. N. and A. V. Adhikari, New J. Chem., 2014, 38, 5018 DOI: 10.1039/C4NJ00911H

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