Rehm-Weller Photoinduced Electron Transfer (2D)

Photoredox catalysis works because an excited photocatalyst is a far stronger electron donor and acceptor than its ground state, and whether that extra thermodynamic push actually delivers an electron to (or from) a quencher molecule is decided by a single free-energy inequality. This 2D panel view lays out the potentials as bar gauges, animates the encounter as a draggable two-body schematic, and strip-charts the live Rehm-Weller free energy — built from the excited-state energy, the two species' redox potentials, and the Coulombic work of forming the ion pair — so you can watch turnovers accumulate only when the driving force is negative.