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rR spectrum of CuMFI activated with16O2 (red) and18O2 (blue) (λex = 458 nm). Inset A: DR-UV-vis spectrum of O2 activated CuMFI. Inset B: “16/18O2” (green) and 1:1 normalized sum of16O2 and18O2 spectra (black). Reproduced with permission from ref 61. Copyright 2009 National Academy of Sciences.
