Relationship between Crystal Packing and Solid-State Fluorescence Quantum Yield in Pyrazine Monoboron Complexes

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  • KUBOTA Yasuhiro
    Department of Materials Science and Technology, Faculty of Engineering, Gifu University
  • HAISHIMA Yuki
    Department of Materials Science and Technology, Faculty of Engineering, Gifu University
  • FUNABIKI Kazumasa
    Department of Materials Science and Technology, Faculty of Engineering, Gifu University
  • MATSUI Masaki
    Department of Materials Science and Technology, Faculty of Engineering, Gifu University

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  • ピラジンホウ素錯体の結晶構造と量子収率との相関について

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Abstract

<p>The relationship between crystal packing and solid-state fluorescence quantum yield (Φf) in pyrazine monoboron complexes 1～6 was investigated. The maximum fluorescence wavelength (Fmax) of the BPh2 complexes 4～6 was blue-shifted (524～628 nm) and the Φf values were higher (0.13～0.29) than those of the corresponding BF2 complexes 1～3 (Fmax: 531～672 nm, Φf: 0.04～0.13), probably due to inhibition of the intermolecular interactions. Despite weaker intermolecular interactions of the dimethylamino-substituted BPh2 complex 6 compared to non-substituted BF2 complex 1, 6 (Φf = 0.13, Fmax = 628 nm) had the same Φf value as 1 (Φf = 0.13, Fmax = 542 nm) due to red-shifted Fmax, which promoted non-radiative processes.</p>

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