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    The Unpaired Electron via Electron Paramagnetic Resonance Spectrometry

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    Of those forms of spectroscopy discussed in this symposium, Electron Paramagnetic Resonance (EPR) Spectrometry stands near the bottom in age. However, its significance makes it well worth discussing. Not only has it won acceptance as a powerful new tool in physics, chemistry and biology, but it has found application in the field of engineering for solid state amplifiers as well. Biophysics has been aided greatly by this new tool, and polymer and free radical chemistry have received a harvest of new data heretofore unavailable. The prospects offered by free radical and ion kinetics has spurred much fresh activity. In this light it is appropriate to discuss some of the unsolved problems. As with almost any form of spectroscopy, one does not have to look far to find problems which fall under this category—the chemist questions the structure of a given free radical, the physicist wishes to know the nature of the crystalline field, the biologist is interested in the structure of some metalloorganic or the nature of any free radical involved in metabolic processes. Not only is there not time to delineate all of the unsolved problems in EPR, there is not even sufficient time to discuss one of these problems in detail. For the sake of complementarity, however, problems in two different areas will be discussed—one related to instrumentation and the other to application.

    Author Information:

    Sands, R. H.
    University of Michigan, Ann Arbor, Mich.

    Committee/Subcommittee: E13.10

    DOI: 10.1520/STP45780S