Redox activity in organic and organometallic compounds has led to their use in a variety of applications in energy transfer, collection, and storage. Whether within an individual molecule, between a donor and acceptor, or at an electrode electrolyte interface, the movement of electrons is determined by a material’s steric and electronic structure as well as its surroundings. Analysis of the electrochemical properties of organic and organometallic species as well as the reactivity of oxidized or reduced states has led to major advances in applications that use redox-active components in their function. This symposium will include fundamental studies of small molecules and macromolecules containing redox-active moieties as well as their use in applications such as electrochemical energy storage, dye-sensitized solar cells, electrochemically-enabled synthesis, and molecular switches.