Peroxidase-Like Reactivity at Iron-Chelation Sites in a Mesoporous Synthetic Melanin

References

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1070Peroxidase-Like Reactivity at Iron-Chelation Sites in a Mesoporous Synthetic Melaninhttps://doi.org/10.31635/ccschem.020.202000307Compositea mesoporous NP form of poly-L-3,4-dihydroxyphenylalanine (referred to as 1 throughout this study), and its ability to mimic the catalytic properties of peroxidase when loaded with reduced [ 1-Fe(II)] and oxidized [ 1-Fe(III)] metals

Materials

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BET
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1070Fe(II)- and Fe(III)-doped poly-L-DOPASample size is relatively unchanged after Fe replacement (davg = 143 and 153 nm). DLS results corroborate the uniform size distribution and demonstrate aqueous stability for 1-Mn(II) (dH = 261.8 nm, polydispersity index (PDI) = 0.101, ζ = −23.1 mV) and 1-Fe (dH = 306.3 nm, PDI = 0.138, ζ = −29.2 mV)58.92

Kinetics

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10701-Fe(II)PODH2O25.433.71mM286.70nM/s10701070
10701-Fe(II)PODH2O26.038.46mM146.03nM/s10701070
10701-Fe(III)PODH2O25.433.18mM120.64nM/s10701070

Applications

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10701-Ma versatile redox-catalysis platform