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Journal of Radioanalytical Chemistry

, Volume 55, Issue 2, pp 199–211 | Cite as

Some applications of positron annihilation lifetime spectroscopy to complex formation and ion association studies

  • G. Duplâtre
  • L. M. Al-Shukri
  • A. Haessler
Article

Abstract

The rate constants for the reactions of positronium with halogen molecules and with halide ions in methanol (I2, Br2, Cl, Br) and in dimethylsulphoxide (I2, Cl) have been measured. The variations of the ortho-positronium lifetime in mixtures of these solutes have been used for quantitative determination of the formation constants of the corresponding polyhalides. These were found to be 2.9 and 5.4 M−1, respectively, for I2Cl and I2Br in methanol and 2.0 M−1 for I2Cl in dimethylsulphoxide. Experiments on acidified AgClO4 solutions confirmed the formation, at molar concentrations, of the Ag2 ClO 4 + species, very probably a triplet ion association.

Keywords

Halide Halogen Formation Constant Positron Lifetime Positron Annihilation Lifetime Spectroscopy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1980

Authors and Affiliations

  • G. Duplâtre
    • 1
  • L. M. Al-Shukri
    • 1
  • A. Haessler
    • 1
  1. 1.Laboratoire de Chimie NucléaireCentre de Recherches Nucléaires et Université Louis PasteurStrasbourg Cedex(France)

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