ABSTRACT
Electron paramagnetic resonance (EPR) spectroscopy is one of the most widely used and productive physical methods in structural and dynamic studies of various condensed systems that contain free radicals, ion-radicals, molecules in triplet states, transition metal complexes, and other paramagnetic centers. This method can be applied the most effectively to the study of elementary chemical reactions. This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book includes a brief description of some EPR fundamentals, which are to be used to interpret experimental results. It contains a consideration of the methodic foundation of 2-mm wave band EPR spectroscopy, and presents some results of the study of model systems, which reveal the possibilities of high resolution over g-factor in the study of different condensed systems. The book also considers 2-mm EPR spectroscopy possibilities in the study of a large group of organic polymer semiconductors and other conducting compounds.
