Abstract:Recommendations are made for standard potentials involving select inorganic radicals in aqueous solution at 25 °C. These recommendations are based on a critical and thorough literature review and also by performing derivations from various literature reports. The recommended data are summarized in tables of standard potentials, Gibbs energies of formation, radical pK a 's, and hemicolligation equilibrium constants. In all cases, current best estimates of the uncertainties are provided. An extensive set of Data Sheets is appended that provide original literature references, summarize the experimental results, and describe the decisions and procedures leading to each of the recommendations.

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solvent molecules. Each of these considerations regarding transition-state formation would contribute to the solvent dependence exhibited by the kinetic activation parameters listed in Table II.Both mass effects and relative hydrogen-bonding versus deuterium-bonding energies (and structure)28 are likely contributors to the different rates of racemization observed for Eu(dpa)33-in H20 versus D20 solutions. ConclusionThis is the first report of time-resolved circularly polarized luminescence (TR-CPL) from a racemic mixture of enantiomeric species excited with circularly polarized light. It is also the first report of kinetic parameters for optical isomerization of a chiral

The mechanism of luminol chemiluminescence is a special case of nucleophilic addition to carbonyl compounds. The breakdown of the key intermediate, an alpha hydroxy hydroperoxide, produces a peracid ortho to an acyl diazene group. After intramolecular addition of the peracid, the energy from nitrogen expulsion is utilized in the formation of an anti-aromatic endoperoxide. Rupture along the O,O bond leaves a substantial part of the ensuing phthalate in its excited state. The emitter is shown to be a mono-protonated phthalate unaccessible by photoexcitation. The dark reaction is a concerted decomposition of the alpha hydroxy hydroperoxidixe to yield ground-state phthalate.