Fig. 2. Kinetics investigation of PAF-1-CH2N+(CH3)3Cl–. (a) UV-vis spectra of AuCl4– aqueous solution in the presence of PAF-1-CH2N+(CH3)3Cl– monitored with time. (b) Comparison of the ion exchange performances of PAF-1-CH2N+(CH3)3Cl– and other ion exchange materials in extracting AuCl4–. (c) Au(CN)2– exchange kinetics of PAF-1-CH2N+(CH3)3OH– (red) and Amberlyst-A26 (green) with an Au(i) initial concentration of 15 ppm in KAu(CN)2 solution.
