Aggregation-induced Emission of a Liquid-crystalline Quinolinium Salt Molecule in Aqueous Solution

• Kana Tanabe

  Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo

• Daisuke Kodama

  Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin Univerisity

• Miki Hasegawa

  Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin Univerisity

• Takashi Kato

  Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo

Abstract

Aggregation-induced emission has been observed in a tripodal liquid-crystalline (LC) quinolinium salt. The quinolinium salt exhibits a liquid-crystalline columnar phase within the temperature range 56–191 °C. In the bulk LC state, the compound shows yellow emission. The fluorescence quantum yield (Φ) is 12.6% in the solid state at room temperature. In contrast, the compound shows no photoluminescence in the THF solution (Φ = ca. 0.0%). Addition of water to the THF solution results in stronger emission, and it shows yellow photoluminescence in the THF/water mixed solution above a water fraction of 60% (Φ = 5.2% in THF/water = 1:9 solution), presumably because of the formation of molecular aggregates in water.

Journal

• Chemistry Letters

  Chemistry Letters 43 (2), 184-186, 2013-10-25

  Oxford University Press (OUP)

Keywords

• General Chemistry

Details

• CRID: 1360846644035588992
• NII Article ID: 130004867971
• DOI: 10.1246/cl.130893
• ISSN: 13480715
• ISSN: 03667022
• Web Site: https://academic.oup.com/chemlett/article-pdf/43/2/184/55635735/cl.130893.pdf
• Data Source:
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  • CiNii Articles
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