Transients and stable radical from the deamination of α-alanine

  • Z. P. Zagórski
  • K. Sehested
Proceedings of the PULS'97


The objects of investigation were single crystals of L-α-alanine, in which radical anion CH3 C˙H CO 2 has been formed by radiation induced deamination of alanine. Previously, this stable radical has been spectrally identified (λmax, ε=1100 M−1·cm−1), and its characteristics have found to be identical with characteristics of the same radical obtained by pulse radiolysis in aqueous solution. The mechanism of radical formation in the solid state is not known. Time resolved pulse radiolysis of single crystal alanine has shown more complicated way of the formation of the same radical in solid state than in aqueous solution. The electrons abstracted from the solid alanine molecule neutralise positive of zwitter-ion alanine. Ammonia is leaving the reaction-complex in time of milliseconds, leaving the stable radical anion.


Radiation Ammonia Physical Chemistry Aqueous Solution Inorganic Chemistry 
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Copyright information

© Akadémiai Kiadó 1998

Authors and Affiliations

  • Z. P. Zagórski
    • 1
  • K. Sehested
    • 2
  1. 1.Department of Radiation Chemistry and TechnologyInstitute of Nuclear Chemistry and TechnologyWarsawPoland
  2. 2.Risř National LaboratoryRoskildeDenmark

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