Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas

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  • Ogawa Shumpei
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Wakayama Takuya
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Watanabe Hiroto
    Tokyo Metropolitan Industrial Technology Research Institute
  • Hayashi Kosei
    Tokyo Metropolitan Industrial Technology Research Institute
  • Ogata Shuhei
    College of Science and Engineering, Aoyama Gakuin University
  • Oaki Yuya
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Hasegawa Miki
    College of Science and Engineering, Aoyama Gakuin University
  • Imai Hiroaki
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University

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  • BCSJ Award Article : Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas

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Abstract

<p>The optical properties of polycyclic aromatic hydrocarbon fluorophores, such as pyrene and perylene, are controlled by confined spaces of meso- and supermicropores in a silica matrix. The quantum yield of fluorescence from monodispersed pyrene and perylene increases with limitation of the excimer formation in 1 nm supermicropores. When the pore diameter is close to the molecular size, solid-state fluorescence having a high quantum yield is achieved via the fluorophores in the confined spaces by suppressing the aggregation, the interaction with charge-transfer sites and the stabilization of the excited state.</p>

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