Advertisement

Viscosity Dependence of Iodine Recombination

  • C. A. Langhoff
  • B. Moore
  • W. Nugent
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 14)

Abstract

Iodine photodissociation provided one of the original examples of the cage effect in liquids. Since then, the concept of a cage has become of central importance to chemists in guiding and understanding their choice of solvents for particular chemical reactions. Recently, HOFFMAN, et al. [1] applied picosecond techniques to study the dissociation and subsequent recombination of I in CCl4 and hexadecane. They showed that the recombination occurs in two time scales, a very short (around 100 nsec) and a much longer one (greater than l nsec.). This was interpreted as a direct demonstration of the cage effect. The short time decay is the recombination of caged radicals (geminate) and the long time decay is due to recombination of randomly diffusing I atoms (nongeminate). This experiment provides a good opportunity to test various diffusion theories, brownian motion theories, and molecular dynamics descriptions of translational motion in liquids. Thus, we have extended these experiments to study the recombination as a function of solvent viscosity and structure.

Keywords

Probe Transmission Solvent Viscosity Viscosity Dependence Cage Effect Cage Radical 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    T.J. Chuang, G.W. Hoffman, and K.B. Eisenthal, Chem. Phys. Lett. 25, 201 (1974).ADSCrossRefGoogle Scholar
  2. 2.
    C.A. Langhoff, K. Guadig, and K.B. Eisenthal, Chem. Phys 46. 117 (1980).CrossRefGoogle Scholar
  3. 3.
    J.T. Hynes, R. Kapral and G.M. Torrie, J. Chem. Phys. 72, 177 (1980).ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1980

Authors and Affiliations

  • C. A. Langhoff
    • 1
  • B. Moore
    • 1
  • W. Nugent
    • 1
  1. 1.Chemistry DepartmentIllinois Institute of TechnologyChicagoUSA

Personalised recommendations