A time-resolved CIDEP study of the laser photoreduction of pyruvic acid by lactic acid

In addition to the well-known initial phototriplet polarization, unusual Chemically Induced Dynamic Electron Polarization (CIDEP) behavior in solutions of neat pyruvic acid/lactic acid has been attributed to ST_ Radical Pair Mechanism (RPM) polarization in combination with absorptive initial Triplet Mechamism (TM) polarization and ST0 RPM polarization. Significant ST_ RPM contributions to such carbon centered radicals with small hyperfine splittings have rarely been observer in solution at room temperature.