Extended Data Fig. 6: 1H and 23Na ssNMR spectra.
From: Hydrophilic microporous membranes for selective ion separation and flow-battery energy storage

a, Dynamic adsorption of water molecules and b, sodium ions in the micropores of AO-PIM-1 (100%). c, Dynamic adsorption of water molecules and d, sodium ions in the micropores of AO-PIM-1 with 56% of amidoxime groups. e, Dynamic adsorption of water molecules and f, sodium ions in the micropores of AO-PIM-1 with 32% of amidoxime groups. g-h, 1H and 23Na ssNMR spectra of PIM-1 for comparison. See more detailed discussion in Supplementary Information 3.1.2.