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A 1,6-Diphenylpyrene-Based, Photoluminescent Cyclophane Showing a Nematic Liquid-Crystalline Phase at Room Temperature

Research Institute for Electronic Science, Hokkaido University, N20, W10, Kita-Ku, Sapporo, Hokkaido 001-0020, Japan
JST-PRESTO, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
Author to whom correspondence should be addressed.
Crystals 2019, 9(2), 92;
Received: 21 January 2019 / Revised: 9 February 2019 / Accepted: 9 February 2019 / Published: 11 February 2019
(This article belongs to the Special Issue Synthesis and Properties of Light-emitting Liquid Crystals)
PDF [2324 KB, uploaded 22 February 2019]


Photoluminescent nematic liquid crystals have been an attractive research target for decades, because of their potential applications in optoelectrical devices. Integration of luminescent motifs into cyclic structures is a promising approach to induce low-ordered liquid-crystalline phases, even though relatively large and rigid luminophores are used as emitters. Here, we demonstrate a 1,6-diphenylpyrene-based, unsymmetric cyclophane showing a stable nematic phase at room temperature and exhibiting strong photoluminescence from the condensed state. The observed sky-blue photoluminescence was dominated by the emission species ascribed to assembled luminophores rather than monomers. View Full-Text
Keywords: liquid crystal; photoluminescence; pyrene; fluorescence; cyclophane liquid crystal; photoluminescence; pyrene; fluorescence; cyclophane

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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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Sagara, Y.; Muramatsu, T.; Tamaoki, N. A 1,6-Diphenylpyrene-Based, Photoluminescent Cyclophane Showing a Nematic Liquid-Crystalline Phase at Room Temperature. Crystals 2019, 9, 92.

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