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Stability of (DHA)2 To monitor the stability of the (DHA)2 dimers, an aqueous solution of 0.1 M DHA and 1.2 M KOH was prepared and aerated so that the DHA was converted to DHAQ and (DHA)2. The 1H NMR spectrum of an 80 μL aliquot of the solution was obtained immediately after aeration. The electrolyte was then stored for 5 days, after which an 1H NMR spectrum of another aliquot was obtained, demonstrating a decrease in the integrals of the (DHA)2 signals. Figure S17. DHA 30 min after aeration DHA 5 days after aeration 1H NMR spectra of DHA, 30 min (top) and 5 days (bottom) after aeration, which show a decrease in integrals of (DHA)2 signals after 5 days in 1.2 M KOH solution. The integral of the signal with chemical shift of 7.45 ppm decreases from 0.38 to 0.14 vs DHAQ, reflecting a loss of over 50%. 19PDF Image | Extending organic flow batteries via redox state management
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