Dear IFEFFIT members,
Recently I have read a paper (https://www.science.org/doi/10.1126/science.abm9257). I have a question about the EXAFS analysis: the wavelet transform of C60-Cu/SiO2 (Figure S15B) has 2 peaks at (k, R) = (1.4, 2.2) and (3.8, 1.5), the author assigned them to Cu-C and Cu-O, respectively. And they think Cu-C is derived from d-\pi interactions between Cu and C60.
However, Cu-C and Cu-O paths can hardly be separated since the f(k) and \phi(k) are nearly identical for C and O. Besides, the Cu-C distance is ~2 angstrom (according to the ref. 30: S.-Z. Zhan et al., J. Am. Chem. Soc. 2020, 142, 5943-5947.), why it can have a peak at R = 2.2 angstrom? (with Cu-O R = 1.5 angstrom)
Thanks you advance for you time!
Best regards,
Maolin Wang
