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Synthesis and mesomorphic properties of new fluorinated hydrogen-bonded supramolecular liquid crystals

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Abstract

A series of fluorinated benzoic acid–pyridine supramolecular liquid crystals and their non-fluorinated analogues were synthesized and studied by use of polarizing optical microscopy (POM), differential scanning calorimetry, and X-ray diffraction. A smectic phase was identified for the fluorine-bearing products, with high clear points, and two peaks (2θ ≈ 6.5°, 24°) in X-ray diffraction. However, non-fluorinated analogues have a nematic phase with low clear points and one peak (2θ ≈ 23°) in X-ray diffraction. This indicates that one trifluoromethyl is able to increase stability and the degree of order of hydrogen-bonded supramolecular liquid crystals.

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Acknowledgments

Financial support from the Shandong Excellent Young Scientist Research Award Fund (Project No. BS2011CL007) is gratefully acknowledged.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China

    Zhilian Liu, Jian Zhang, Zhenning Yu, Tengfei Li & Shuxiang Zhang

  2. Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, Jinan, 250022, China

    Zhilian Liu, Jian Zhang, Zhenning Yu, Tengfei Li & Shuxiang Zhang

  3. Dalian Construction School, Dalian, 116031, China

    Jianzhi Han

Authors
  1. Zhilian Liu
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  2. Jianzhi Han
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  3. Jian Zhang
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  4. Zhenning Yu
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  5. Tengfei Li
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  6. Shuxiang Zhang
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Correspondence to Shuxiang Zhang.

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Liu, Z., Han, J., Zhang, J. et al. Synthesis and mesomorphic properties of new fluorinated hydrogen-bonded supramolecular liquid crystals. Monatsh Chem 145, 71–77 (2014). https://doi.org/10.1007/s00706-013-1021-8

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  • DOI: https://doi.org/10.1007/s00706-013-1021-8

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