Magnetic parameters Nafion

TABLE 1. Magnetic Parameters of the Radical RCF2CF2 in Nafion ... 

Lund, A., Macomber, L. D., Danilczuk, M., Stevens, J. E., and Schlick, S. 2007. Determining the geometry and magnetic parameters of fluorinated radicals by simulation of powder ESR spectra and DFT calculations the case of the radical RCF2CF2 in Nafion perfluorinated ionomers. The Journal of Physical Chemistry B 111 9484-9491. 

There have been Mossbauer studies of Nafion membranes by several groups (J —6), besides some work on other ionomers (7,8) and a body of results on polymers where iron or tin is introduced into the polymeric matrix as a probe impurity (8). This chapter will concentrate on the information that has been extracted from the Mossbauer studies of Nafion membranes, and their variations as a function of parameters such as temperature, applied magnetic field, water content and chemical treatment. The results will be discussed in terms of the information they provide about the structure of the ionic phase in perfluorosulfonate materials. 

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