Rudolf Marcus of Caltech was at a meeting of the Electrochemical Society in Toronto when he learned that the Royal Swedish Academy of Sciences had awarded him the 1992 Nobel Prize in Chemistry “for his contributions to the theory of electron transfer reactions in chemical systems.” The meeting participants were only too glad to raise their glasses to Marcus, for the fundamental theory he elucidated in the 1950s and 1960s underlies much of their work. Its applications include such diverse phenomena as photosynthesis, electrically conducting polymers, chemiluminescence and corrosion. As Marcus remarked to us, “the field continues to grow and grow.”

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