The application of the spin trap, phenyl t-butyl nitrone, to the study of the .GAMMA.-radiolysis of cyclohexane.

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• It was shown that cyclohexyl radicals formed by the γ-radiolysis of cyclohexane were trapped by phenyl <I>t</I>-butyl nitrone (PBN) to give a nitroxide with a well defined ESR spectrum. We measured the yield of this nitroxide. In order to establish the radical and electron scavenging properties of PBN, we measured the effect of this compound on the yields of hydrogen and nitrogen by adding dinitrogen oxide in cyclohexane together with PBN. The results suggested that PBN is able to scavenge not only free radicals but also electrons. The following relative rates were obtained: <I>k</I>(e<SUP>−</SUP>+PBN→PBN<SUP>−</SUP>)/<I>k</I>(e<SUP>−</SUP>+N<SUB>2</SUB>O→N<SUB>2</SUB>O<SUP>−</SUP>)=0.7 and <I>k</I>(H+PBN→HPBN)/<I>k</I>(H+C<SUB>6</SUB>H<SUB>12</SUB>→H<SUB>2</SUB>+C<SUB>6</SUB>H<SUB>11</SUB>)≈200 at room temperature. The <I>G</I>-value of the scavengeable hydrogen atoms from cyclohexane was estimated to be 3.4±0.4.

• 公益社団法人 日本化学会の論文

著者

• Ishikawa Yo-ichi

  Department of Applied Physics, Tokyo Institute of Technology

• Sato Shin

  Department of Applied Physics, Tokyo Institute of Technology

• Iwahashi Haruo

  Department of Applied Physics, Tokyo Institute of Technology

• Koyano Kinko

  Institute of Chemistry, College of General Education, The University of Tokyo

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