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. Author manuscript; available in PMC: 2015 Jul 7.
Published in final edited form as: European J Org Chem. 2014 May 1;2014(14):2972–2979. doi: 10.1002/ejoc.201400025

Figure 4.

Figure 4

Transport of different substrates with calix[4]arene tetraphosphonic acid receptor 6 in a U-tube experiment. Source phase: MQ water (4mL), NBD-choline 11 (1 mm) and FITC-choline 9* (0.5 mm); organic phase: CH2Cl2 (10 mL), 6 (0.5 mm); receiving phase: MQ water; stirring speed = 400 rpm, room temperature, results are reported as the average of duplicate trials. For FITC-choline, the maximum deviation from the mean was ±0.3% (not shown), and for NBD-choline, it was ±0.8% (not shown). (* guest precipitation occurred at the interface when 1 mm solution was used.).