Fig. 5: Characterization of CH3I/MFU-Cu(I) interactions.
From: Strategies for high-temperature methyl iodide capture in azolate-based metal-organic frameworks
a Illustration of the synthetic route from MFU-Zn-Cl to MFU-Cu(I) and its subsequent CH3I adsorption. Note that the interaction mode between CH3I and MFU-Cu(I) was obtained through DFT structure optimization, as shown in Supplementary Fig.12. b Solid-state 13C NMR spectra of pristine MFU-Cu(I), CH3I-adsorbed MFU-Cu(I) (designated as CH3I@MFU-Cu(I)), and the regenerated MFU-Cu(I) (designated as re-MFU-Cu(I)). c EPR spectra of MFU-Cu(I) and CH3I@MFU-Cu(I). d Cu K-edge X-ray absorption near edge structure spectra of MFU-Cu(I) and CH3I@MFU-Cu(I), along with Cu foil, Cu2O, and CuO as reference materials. e PXRD patterns of pristine MFU-Cu(I) and two regenerated MFU-Cu(I) samples, which underwent CH3I adsorption at 0.2 bar and 0.01 bar of CH3I, respectively. f Fourier-transformed k2-weighted EXAFS spectra of pristine MFU-Cu(I) and two MFU-Cu(I) samples subjected to CH3I adsorption at pressures of 0.2 bar and 0.01 bar, respectively. Included for comparison are the spectra of reference materials: Cu foil, Cu2O, and CuO.
