Showing MOFs' true colors: An iron-based metal–organic framework, MIL-53(Fe), is explored as an enzyme mimic with intrinsic peroxidase-like activity. MIL-53(Fe) can catalyze the oxidation of different peroxidase substrates in the presence of H2O2 (see graphic; TMB=3,3′,5,5′-tetramethylbenzidine, OPD=o-phenylenediamine), providing a new and simple colorimetric detection of hydrogen peroxide and ascorbic acid.
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Ai et al. (2013) studied this question.
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