Electron-exchange polymers description

The purpose of this paper is the presentation of a brief overview of recent literature in which new models of electronic states in polymers and molecular solids have been proposed (, 2, 5-16). Since localized (e.g., molecular-ion) states seem prevalent in these materials, I indicate in Sec. II the physical phenomena which lead to localization. Sec. Ill is devoted to the description of a model which permits the quantitative analysis of the localized-extended character of electronic states and to the indication of the results of spectroscopic determinations of the parameters in this model for various classes of polymeric and molecular materials. I conclude with the mention in Sec. IV of an important practical application of these concepts and models The contact charge exchange properties of insulating polymers ( 7, 17, 18, 19). 

In this paper the development and major applications of a new relaxation-localization model of electronic states in molecular solids have been briefly outlined. This model affords a detailed description of valence-electron photoemission spectra which, moreover, have been utilized to verify explicitly several of its important predictions. It provides a similar description of DV absorption spectra and electron-transfer processes. Inadequate experimental data are available in these cases, however, to test the model critically. Finally a phenomenological version of the model has been shown to provide a quantitative description of steady-state contact charge exchange in polymers and to constitute a link between this charge exchange and the molecular architecture of pendant group polymers. 

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