Fourier transform EXAFS spectra of

Fig. 6 Fourier transformed EXAFS spectra of sPEEK-ZrP membranes prepared by contact of ion-exchange membranes with H3PO4 (IM, 80 C) for 5 min (V) and 15h ( ), compared with that of well-crystallised a-ZrP prepared using the HE method ( )...

Fourier transformed EXAFS spectra of e purple enzyme reveal three major peaks, assigned as follows first shell, Fe-0(N) second shell, Fe— Fe and Fe-P(C) third shell, Fe—N(C) (imidazole). Due to interference by Fe-0 (tyrosine) bonds at 1.8-1.9 A, an Fe-p-oxo bond could not be detected. The Fe— Fe distance of 3.0 A lies within the range expected for a p-oxo bridged structure. The spectrum of the purple, phosphate bound form also provides direct evidence for phosphate coordination to one of the iron atoms, with an Fe—P distance of 3.0 A. 

---