The Cadmium-photosensitized Decomposition of Acetone

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概要

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• The cadmium-photosensitized decomposition of acetone has been studied and compared with the 3261 Å direct photolysis at 270±1°C. The data could be consistently explained by the following reaction mechanism:<BR>& Cd(^3P_1)+CH_3COCH_3→Cd+^3A^*\labeleq1<BR>& ^3A^*→2CH_3+CO\labeleq2<BR>& CH_3+CH_3COCH_3→CH_4+CH_3COCH_2\labeleq3<BR>& 2CH_3→C_2H_6\labeleq4<BR>& CH_3+CH_3COCH_2→C_2H_5COCH_3\labeleq5<BR>& 2CH_3COCH_3→(CH_3COCH_2)_2\labeleq6<BR>The mechanism from (2) to (6) is exactly the same as that proposed for the 3130 Å direct photolysis at temperatures higher than 100°C. By using the <I>cis-trans</I> isomerization of 2-butene as the actinometer, the quantum yield of the photosensitized decomposition of acetone was estimated to be 0.3. Kinetic analysis showed that the energy-rich ethane produced by the recombination reaction (4) has the lifetime of 2×10<SUP>−8</SUP> sec at 270°C.

• 公益社団法人 日本化学会の論文

著者

• Sato Shin

  Department Of Chemistry School Of Science The University Of Tokyo

• Takahashi Chiharu

  Department Of Applied Physics Faculty Of Engineering Nagoya University:musashino Electrical Communication Laboratory Ntt

• Tsunashima Shigeru

  Department of Applied Physics, Tokyo Institute of Technology

• Sato Shin

  Department of Applied Physics, Tokyo Institute of Technology

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