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A: Plot of pseudo-first order rate constants for the reaction of 70 μM [Co(TPT)]2+ with oxygen. Solid line represents a linear fit giving kbi = 0.43 M−1s−1. Insert B: Change in absorbance in aerated solutions were recorded at 10 min intervals. Conditions: 200 mM NaCl, 40.0 mM HEPES, pH 7.1 at 25 °C.
