Fig. 4: Oxygen atom transfer reactions.

a Comparison of CH₃OH yield by PA-≡Fe^IV = O and PS-≡Fe^IV = O. b Comparison of CH₃OH yield rates in this PA-≡Fe^IV = O driven system with those in light- or thermal-driven CH₄ activation systems. c Illustration of CH₄ oxidation process by ≡Fe^IV = O. d EPR spectra to identify the ·CH₃ intermediate after H abstraction by PA-≡Fe^IV = O and PS-≡Fe^IV = O. e CH₄ consumption and CH₃OH generation by PA-≡Fe^IV = O through in-situ Fourier Transform infrared spectroscopy. f Energy barriers of CH₄ conversion process by PA-≡Fe^IV = O and PS-≡Fe^IV = O. g MPS and h Ph₃P oxidation efficiencies by PA-≡Fe^IV = O and PS-≡Fe^IV = O in comparison. i Comparison of efficiencies over PA-≡Fe^IV = O and PS-≡Fe^IV = O for styrene epoxidation to styrene oxide. Experiment conditions: [FeS₂]₀ = 0.02 g (for CH₄ oxidation), [FeS₂]₀ = 0.1 g (for other reactions), [ClO₂^–]₀ = 1.0 mmol L⁻¹ (if not specified), aqueous CH₄-containing solution volume = 20 mL, other solution volume = 100 mL. The error bars represent the standard deviation derived from two repeated experiments.