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(a) Absorbance changed at 314 nm as N2 and O2 were bubbled alternately through an DABA-Co(II) complex aqueous solution (C Co(II) = 2.0 × 10−4 mol·dm−3). (b) Percentage of oxygenation capacity (P%) of DABA-Co(II) as a function of oxygenation time.
