Influences of Hydrogen Bonding-Based Stabilization of Bolaamphiphile Layers on Molecular Diffusion within Organic Nanotubes Having Inner Carboxyl Groups.

This paper reports molecular diffusion behavior in two bolaamphiphile-based organic nanotubes having inner carboxyl groups with different inner dimeters (10 and 20 nm) and wall structures, COOH-ONT and COOH-ONT, using imaging fluorescence correlation spectroscopy (imaging FCS). The results were compared to those previously obtained in a similar nanotube with inner amine groups (NH-ONT). COOH-ONT, as with NH-ONT, were formed from a rolled bolaamphiphile layer incorporating triglycine moieties, whereas COOH-ONT consisted of four stacks of triglycine-free bolaamphiphile layers.