Near-UV photolysis of pyruvic acid results in decarboxylation within 0.8 ps. In contrast, pyruvate anions excited by near-UV light relax back to the ground state within 50 ps with no detectable photolysis. The sharply different behavior of the acid and its conjugate base provides a mechanistic explanation for the puzzling pH dependence of the pyruvic acid photolysis.
J. Thøgersen, T. Weidner and F. Jensen, Phys. Chem. Chem. Phys., 2026, Advance Article , DOI: 10.1039/D5CP04995D
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