Fig. 5
From: Fast and selective fluoride ion conduction in sub-1-nanometer metal-organic framework channels
Influence of concentration and pH on F−, Cl− conductivity and F−/Cl− selectivity. a, b F− and Cl− conductivities in PET-UiO-66-X nanochannels as a function of ion concentration. F− conductivities in UiO-66-X nanochannels are much higher than those in bulk solution, while Cl− conductivities in UiO-66-X nanochannels are much lower than those in bulk solution. c F−/Cl− selectivity of PET-UiO-66-X nanochannels as a function of ion concentration. Among the MOFs considered, the UiO-66-N+(CH3)3 nanochannel exhibits the highest F−/Cl− selectivity (~240). d F−/Cl− selectivity of PET-UiO-66-X nanochannels measured in 0.1 M KF and KCl solutions at different pH values. Error bars represent the standard deviation of three measurements of a sample
