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Issue 105, 2014
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Thieno[3,2-b]thiophene derivatives exhibiting semiconducting liquid-crystalline phases at lower temperatures

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Abstract

We synthesized novel liquid crystalline semiconductors bearing an extended π-conjugated mesogen based on thieno[3,2-b]thiophene, which exhibit high solubility and low phase transition temperature. In particular, lateral methyl substitution to the mesogenic unit led to the formation of efficiently self-organized LC domains at lower temperature than that of reported liquid crystalline thieno[3,2-b]thiophene derivatives. Smectic A and smectic E phases were observed by a polarizing optical microscope over a wide temperature range between 75 and 125 °C. Hole mobility was determined by the time-of-flight (TOF) method, and calculated up to 2 × 10−3 cm2 V−1 s−1. Herein we report the synthesis, thermophysical and carrier transport properties of novel thieno[3,2-b]thiophene based liquid-crystalline semiconductors.

Graphical abstract: Thieno[3,2-b]thiophene derivatives exhibiting semiconducting liquid-crystalline phases at lower temperatures

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Publication details

The article was received on 26 Sep 2014, accepted on 06 Nov 2014 and first published on 06 Nov 2014


Article type: Paper
DOI: 10.1039/C4RA11326H
Citation: RSC Adv., 2014,4, 60511-60518
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    Thieno[3,2-b]thiophene derivatives exhibiting semiconducting liquid-crystalline phases at lower temperatures

    Y. Kim, M. Funahashi and N. Tamaoki, RSC Adv., 2014, 4, 60511
    DOI: 10.1039/C4RA11326H

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