Mechanism of quenching of SO2 C(1B2) by He,Ar, and N2.

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概要

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• Sulfur dioxide gas was excited to \~{C}(<SUP>1</SUP>B<SUB>2</SUB>) state by steady illumination and the total intensity and the spectrum of the fluorescence were measured in the SO<SUB>2</SUB> pressure range of 0.1–1 Torr (1 Torr≈133.322 Pa) both in the absence and in the presence of He, Ar, and N<SUB>2</SUB> up to 600 Torr. The observed fluorescence spectrum was broad but the wavelength of the maximum intensity was found to be dependent upon excitation wavelength in the range of 240–220 nm. Addition of foreign gases caused the blue shift of the fluorescence spectrum. The Stern-Volmer plots were nonlinear for quenching by the foreign gases but linear for self-quenching. It was suggested that the foreign gas molecules cause not only vibrational deactivation but also collision induced transition between <SUP>1</SUP>B<SUB>2</SUB> state and a nonemitting state and that the rate constants of the transition to the nonemitting state are larger from higher vibrational levels than from lower ones.

• 公益社団法人 日本化学会の論文

著者

• Oka Takefumi

  Nagaoka College Of Technology

• Oka Takefumi

  Nagaoka Technical College

関連論文

• Study on Photoacoustic Signals from Powdered Samples
• Mechanism of quenching of SO2 C(1B2) by He,Ar, and N2.

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