The isotope effect on the quenching of the cadmium triplet state by methanol.

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概要

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• The isotope effect on the Cd-photosensitized emission of methanol has been investigated using CH<SUB>3</SUB>OH, CH<SUB>3</SUB>OD, CD<SUB>3</SUB>OH, and CD<SUB>3</SUB>OD. The relative quenching efficiencies for the 326.1 nm resonance line were 1 : 0.3 : 0 .9 : 0.3 in the order of CH<SUB>3</SUB>OH, CH<SUB>3</SUB>OD, CD<SUB>3</SUB>OH, and CD<SUB>3</SUB>OD. The emission intensities from the intermediate complex between an excited cadmium and methanol were also measured. The band-shape was not affected by the substitution of D atoms. The intensity ratio was 1 : 3.1 : 1.1 : 3.1 in the order of CH<SUB>3</SUB>OH, CH<SUB>3</SUB>OD, CD<SUB>3</SUB>OH, and CD<SUB>3</SUB>OD, when the incomplete quenching was corrected. These results were explained by the following quenching processes:<BR>Cd^*+CH_3OH & →Cd···H···OCH_3<BR>&→Cd···O<_CH_3^H<BR>where Cd<SUP>*</SUP> represents Cd(<SUP>3</SUP>P<SUB>1</SUB>) and/or Cd(<SUP>3</SUP>P<SUB>0</SUB>). The D/H kinetic isotope effect on the former process was estimated to be 0.3

• 公益社団法人 日本化学会の論文

著者

• Tsunashima Shigeru

  Department of Applied Physics, Tokyo Institute of Technology

• Sato Shin

  Department of Applied Physics, Tokyo Institute of Technology

• Morita Kuniko

  Department of Applied Physics, Tokyo Institute of Technology

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