1.D.30 The Artificial Hydrazide-appended pillar[5]arene Channel (HAPA-C) Family Hydrazide-appended pillar[5]arene derivatives have been synthesized (Hu et al., 2012). X-ray crystal structure analysis and ¹H NMR studies revealed that the molecules adopt unique tubular conformations. Inserting the molecules into the lipid membranes of vesicles leads to the transport of water through the channels produced by single molecules, as supported by dynamic light scattering and cryo-SEM experiments. The channels exhibit the transport activity at a very low channel to lipid ratio (0.027 mol %), and a water permeability of 8.6 × 10^-10 cm s^-1 is realized. In addition, like natural water channel proteins, these artificial systems also block the transport of protons (Hu et al., 2012).
This family belongs to the Arene Artificial Ion Transporter (AAIT) Superfamily.
References:
Hu XB., Chen Z., Tang G., Hou JL. and Li ZT. (2012). Single-molecular artificial transmembrane water channels. J Am Chem Soc. 134(20):8384-7.