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

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Author(s)

    • Tanabe Kana
    • Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo
    • Kodama Daisuke
    • Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin Univerisity
    • Hasegawa Miki
    • Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin Univerisity
    • Kato Takashi
    • 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, 2014

    The Chemical Society of Japan

Codes

  • NII Article ID (NAID)
    130004867971
  • Text Lang
    ENG
  • ISSN
    0366-7022
  • Data Source
    J-STAGE 
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