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Bent Shaped 1,3,4-Oxadiazole/Thiadiazole heterocyclic rings containing liquid crystals

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Abstract

Two series of bent shaped 1,3,4-oxadiazole/thiadiazole heterocyclic ring containing liquid crystalline (LC) compounds were synthesized and characterized by FT-IR, 1H, 13C-NMR and ESI-Mass spectroscopic techniques. Liquid crystal properties were investigated by polarized optical microscopy and differential scanning calorimetry. All the compounds exhibited mesophases such as nematic, smectic A and smectic C phases. The liquid crystalline effects were ascertained by changing the central atom in the heterocyclic ring and by increasing the length of the terminal alkyloxy chains which bring considerable improvements on the mesomorphic properties. The absorption and emission spectral studies of all the compounds were investigated and confirmed.

Two series of bent shaped azomethine-containing low molecular weight organic liquid crystalline compounds containing 1,3,4-oxadiazole/thiadiazole derivatives are reported. These compounds are also fluorescent.

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Acknowledgments

The authors gratefully acknowledge the University Grants Commission, New Delhi, Government of India for the financial support [39-691/2010 (SR)]. Instrumentation facility provided under FIST-DST and DRS-UGC to Department of Chemistry, Anna University are sincerely acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, Anna University, Chennai, 600 025, India

    CHINNAIYAN SELVARASU & PALANINATHAN KANNAN

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  1. CHINNAIYAN SELVARASU
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  2. PALANINATHAN KANNAN
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Correspondence to PALANINATHAN KANNAN.

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Supplementary Information

Spectral and DSC data are given (figures S1–S5 and S6) which are available at www.ias.ac.in/chemsci.

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SELVARASU, C., KANNAN, P. Bent Shaped 1,3,4-Oxadiazole/Thiadiazole heterocyclic rings containing liquid crystals. J Chem Sci 127, 1831–1838 (2015). https://doi.org/10.1007/s12039-015-0949-0

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  • DOI: https://doi.org/10.1007/s12039-015-0949-0

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