Molecular Engineering

, Volume 4, Issue 1–3, pp 229–257 | Cite as

Fourier transform electron paramagnetic resonance studies of photochemical reactions in heterogeneous media

  • Hans van Willigen
  • Patricia R. Levstein
Part III: Trends In Modern Techniques


FT-EPR has proved to be an excellent spectroscopic technique for the study of free radicals generated in photochemical reactions. The high spectral and time resolution make it possible to identify transient free radicals. Analysis of the time dependence of the spectra gives data on the kinetics of radical formation and decay. Chemically induced dynamic electron polarization (CIDEP) effects give information on reaction mechanisms and radical pair characteristics. Relaxation and linewidths data provide an insight into molecular motion. This contribution reviews instrumental aspects of the technique and CIDEP mechanisms that can affect the spectra. The utility of the method is illustrated with a discussion of applications in the study of photoinduced electron transfer reactions in homogeneous and heterogeneous media.

Key words

EPR photochemistry radicals triplets CIDEP 


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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Hans van Willigen
    • 1
  • Patricia R. Levstein
    • 1
  1. 1.Department of ChemistryUniversity of Massachusetts at BostonBostonUSA

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