Fig. 3: Characterization of ZJU-X99 before and after Sr2+ adsorption.
From: A negatively-charged supramolecular trap for precisely catching strontium ion
a High-resolution Sr 3d spectrum of Sr2+⊂ZJU-X99. b High-resolution O 1s spectra of ZJU-X99 before and after Sr2+ adsorption. c Solid-state 1H NMR spectra of ZJU-X99 before and after Sr2+ adsorption. d Solid-state 13C NMR spectra of ZJU-X99 before and after Sr2+ adsorption. e Sr K-edge XANES spectra for Sr2+⊂ZJU-X99 and SrO. f EXAFS analysis of the k-space spectrum of Sr2+⊂ZJU-X99. g Fourier transforms of K-edge EXAFS spectra of Sr2+⊂ZJU-X99. h WT contour plots for Sr2+⊂ZJU-X99. i WT contour plots for SrO.
