Fig. 5: Determination of potassium ion transport performance.

a Sequential and End-point methods for evaluating ion transport activities of 3 shown in (b) and (d)–(f), respectively, with a slightly different sequential method presented in Supplementary Fig. 4 for obtaining data shown in (c). b K⁺ transport activity of 3 in the presence of H under UV irradiation increases by 300% relative to that in the absence of light irradiation. c Light-triggered on-off regulation of 3-mediated K⁺ transport. d3-mediated K⁺ transport activities at 2 μM in the presence of H in dark for 300 s or under UV irradiation for 60 s using the End-point method. e Comparative K⁺ transport activities between H + t-3 and H + c-3 at different concentrations determined using the End-point method. f The EC₅₀ values for t-3, c-3, H + t-3 and H + c-3 determined using the End-point method. All data represent mean ± SD from three independent experiments (n = 3).