Extended Data Fig. 4: Molecular separations performance of DUCKY membranes.

(a,b) Polystyrene rejections of DUCKY polymers in ethanol (a) and (b) toluene, compared to those of PIM-1 in (a) methanol (ref. 6) and (b) toluene (ref. 8). (c) Hydrocarbon molecular weight cutoff curve (~415 g/mol) for DUCKY-9 from an 11-component mixture using 1 mol% of each solute in toluene. Error bars represent one standard deviation from the mean of three independent runs with different membranes. The MWCO was determined by fitting all rejections above 60% to a logarithmic curve (y = 44.319ln(x) - 177.18) and interpolating to 90%.