Fig. 6. Zoomed in UV-vis spectra of the low-energy region (∼700–1000 nm) for the low-spin heme–peroxo–copper complexes with various TMPA-based copper ligands, demonstrating the characteristic blue shift observed with substituents that H-bond to the O–O peroxo core. Bottom left: LS-TMPA (black), LS-^CH3TMPA (blue), and LS-^(CH3)2TMPA (orange). Bottom right: LS-TMPA (black), LS-^NH2TMPA (red), and LS-^(NH2)2TMPA (green).