Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (04): 308-314.doi: 10.3866/PKU.WHXB19950405

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The Effect of Light Intensity on the Photoinduced BrC2F4Br+C2F4 Telomerization Reaction

Zhang Lin-Yang,Zhang Jia-Mu,W.Fuss   

  1. University of Science and Technology of China,Hefei 230026|Max-Planck-Institute fuer Quantenoptik D-85740 Garching,F.R.Germany
  • Received:1994-03-22 Revised:1994-06-06 Published:1995-04-15
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Abstract:

BrC2F4Br+C2F4 reaction induced by different light source (KrF laser, Xe-lamp, low pressure Hg-lamp) has been investigated. Experiments show that the reaction product distribution depends not only on reaction composition, but on light intensity and light source as well. A reaction mechanism has been suggested and the rate constant of the addition reaction has been calculated by kinetic analysis, for BrC2F4+C2F4→BrC4F8 kadd=(2±1)×107cm3•mol-1•s-1 (room temp.); Br(C2F4)n≧2+C2F4 addition reaction, kadd=(1.2±0．4）×107Cm3•mol-1•s-1．

Key words: Photoreaction, Telomerization, Rection mechanism, Rate constant of addition reaction