... However, further increase in the mole fraction of 4bresults in a decrease of the CD intensity. Thus, only the nanotubes are CDactive.3Porphyrins and PhthalocyaninesSince porphyrin and phthalocyanine ... and negatively charged porphyrin derivatives [21]. Whenporphyrins 5 (Fig. 5a) and 6a (Fig. 5b), appended with sulfonate and 4-pyridyl groups, respectively, are allowed to co-assemble in water, ... nanotubes and nanocoils. Such π-conjugatedmolecules include phenylenes, phenylene vinylenes, phenylene ethynylenes, porphyrins,phthalocyanines, and polycyclic aromatic hydrocarbons, which are properly...