Thermal energy assisted heavy atom effect: Fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe

Makoto Maeda, Urs Graf, Hiromichi Niikura, Masami Okamoto, Satoshi Hirayama

研究成果: Article

11 引用 (Scopus)

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The fluorescence lifetime, Tf, of 9-cyanoanthracene (9CNA) in the supercritical fluid (SF) of Xe (6.8 MPa at 293 K) is found to be 2.39 ± 0.13 ns, which is much shorter than the 17.78 ± 0.43 ns measured in SF of CO2. This large decrease in Tf is interpreted in terms of the vibronic-level-dependent heavy atom effect which is revealed by a comparison of the absorption and fluorescence excitation spectra measured for the 1:1 van der Waals complex of 9CNA with Xe generated in a supersonic jet. The effect of the temperature on Tf observed in Xe is concordant with the vibronic-level-dependent heavy atom effect.

元の言語English
ページ(範囲)175-180
ページ数6
ジャーナルChemical Physics Letters
257
発行部数1-2
DOI
出版物ステータスPublished - 1996 7 19
外部発表Yes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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