A Nanotube of Cyclic Porphyrin Dimers Connected by Nonclassical Hydrogen Bonds and Its Inclusion of C_(60) in a Linear Arrangement

摘要

Recently, there has been great interest in the design and synthesis of nanotubular assemblies composed of porphyrin derivatives. They are expected to offer tailored one-dimensional spaces and to be employed in technological applications, such as molecular-scale electronics, optical devices, sensors, light-energy conversion, and catalysis. Moreover, supramolecular architectures consisting of porphyrin derivatives and fullerenes are currently attracting much attention as functional materials, and a synthetic supramolecular peapod in which fullerenes are aligned within an organic nanotube has been of interest as an analogue to fullerenes included in carbon nanotubes. However, it has still been difficult to create the rationally predictable structure of a porphyrin nanotube, and there have been only a few examples of porphyrin nanotubes crystallographically analyzed at the atomic level.