Nanotubes from Hydrogen Bonding-Induced Helical Structures

3 Nanotubes from Hydrogen Bonding-Induced Helical Structures 

Another family of organic molecules that spontaneously form helical nanotubes are the long hydrogen bonding-driven aiyl-based foldamers [17-19]. The main considerations for the structural design of helical foldamers are the size of the monomers and the substitution pattern of the aromatic rings used. Indeed, once 

By introducing hydrogen bonding from the interior and the exterior of the backbone, Li and co-workers prepared a helical foldamer from a tridecameric aromatic hydrazide (Fig. 8.4a) [23]. The presence of the three-centered hydrogen bonding helps to stabilize the helical conformation which forms a tubular structure composed of two turns (Fig. 8.4b, c). In this helical structure, half of the carbonyl 

---