Fig. 6: Structural and functional insights into crosslinked polymer membranes.
From: Monovalent anion-selective membranes fabricated via in situ interfacial polymerization
a Crosslinked deprotonated polymer with bulky -COO− groups near the surface, enhancing Cl⁻ permeability and repelling SO₄²− through electrostatic effects. b Protonated crosslinked polymer adopting a compact conformation due to reduced electrostatic repulsion (heat map range: +0.224e₀ to −F0.224e₀). c Base (non-crosslinked) polymer showing minimal anion selectivity during ion transport. d Crosslinked polymer enabling selective transport Cl⁻ passes freely, while SO42− is effectively rejected, demonstrating improved monovalent ion selectivity.
