| Abstract: | The extraction of dyes from aqueous phase to organic phase using calix[4]arene-linked triphenylene dimers (1a and 1b) with large π-cavity as extractants were examined. 1a and 1b showed outstanding extraction percentage for four common dyes [Orange G sodium salt (OG), Brilliant ponceau (BP), Methyl Green (MG), and Xylenol Orange disodium salt (XO)]. The highest extraction percentage of 1a was 95% for MG. Moreover, the abilities of liquid membrane transport of 1a and 1b for dyes were studied. The influences of pH value, concentration, solvent, stirring speed, and the temperature on liquid membrane transport was investigated to optimize the transport condition. The results of liquid membrane transport suggested 1a and 1b were excellent carriers for tested dyes with high fluxes. The high concentration in the source phase or membrane phase, CH2Cl2, high stirring speed, and low temperature were favorable for the efficiency of liquid membrane transport. The high extraction percentages and outstanding liquid membrane transport abilities indicated that 1a and 1b possessed excellent complexation for dyes based on the π-π stacking action between dyes and triphenylene units. |
