Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available from the corresponding author upon reasonable request. References 1, , , et al., “Designing Membranes With Specific Binding Sites for Selective Ion Separations,” Nature Water 2 (2024): 706–718, https://doi.org/10.1038/s44221-024-00279-6.