File Name : figure_1s.tif

Caption : figure 1s. continuous-wave epr spectrum of the zn2+-protoporphyrin ix cation at 50 k. the spectrum displays a signal at g = 2.003. the cationic species was generated by cryogenic white light illumination of a 6 mm zn2+-protoporphyrin ix using acn as a solvent.

File Name : figure_2s_a.tif

Caption : figure 2s. (a) experimental and (b) simulated 2d 67zn hyscore spectrum of the zn2+-protoporphyrin ix cation at 5 k. the spectrum displays a pair of cross-peaks that are symmetric about the main diagonal that arise from the magnetic interaction of 67zn (nuclear spin, i = 5/2) with the unpaired electron spin (s = ½) of the zn2+-protoporphyrin ix cation.

File Name : figure_2s_b.tif

Caption : figure 2s. (a) experimental and (b) simulated 2d 67zn hyscore spectrum of the zn2+-protoporphyrin ix cation at 5 k. the spectrum displays a pair of cross-peaks that are symmetric about the main diagonal that arise from the magnetic interaction of 67zn (nuclear spin, i = 5/2) with the unpaired electron spin (s = ½) of the zn2+-protoporphyrin ix cation.

File Name : figure_3s_a.tif

Caption : figure 3s. comparison of the experimental 2d 67zn hyscore spectrum of (a) 67zn-labelled and (b) unlabelled c. thermophilum membranes containing rcs. both of the plots are normalized by the same number of scans on samples with similar concentrations. the cross-peaks from the hyperfine interactions with the 67zn atom(s) that are observed in part (a) are a result of the high levels of isotopic enrichment of 67zn in the 67zn-labelled c. thermophilum membranes containing rcs.

File Name : figure_3s_b.tif

Caption : figure 3s. comparison of the experimental 2d 67zn hyscore spectrum of (a) 67zn-labelled and (b) unlabelled c. thermophilum membranes containing rcs. both of the plots are normalized by the same number of scans on samples with similar concentrations. the cross-peaks from the hyperfine interactions with the 67zn atom(s) that are observed in part (a) are a result of the high levels of isotopic enrichment of 67zn in the 67zn-labelled c. thermophilum membranes containing rcs.