Supramolecular nano networks formed by molecular-recognition-directed self-assembly of ditopic calix[5]arene and dumbbell [60]fullerene.
Dumbbell fullerene 1 and ditopic bisdouble-calix[5]arene 2 were synthesized. Their iterative host-guest complexations create the supramolecular nano network. Scanning electron microscopy revealed the formation of the branched fiber, possessing a length of more than 100 mum and widths of 250-500 nm on a glass plate. More detailed information was given by atomic force microscopy. The formed fibers on a mica plate have widths of 60-90 nm and heights of 1.2-1.9 nm. The nanosize assemblies are probably composed of a bundle of 40-60 polymer chains created by entangling the alkyl side chains with van der Waals interaction.
Haino
Takeharu
T
Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526 Japan. haino@sci.hiroshima-u.ac.jp
Matsumoto
Youko
Y
Fukazawa
Yoshimasa
Y
D047250:Calixarenes / Q000138:chemical synthesis* / Q000737:chemistry; D037741:Fullerenes / Q000737:chemistry*; D046911:Macromolecular Substances / Q000138:chemical synthesis* / Q000737:chemistry; D018625:Microscopy, Atomic Force; D015394:Molecular Structure; D036103:Nanotechnology / Q000379:methods*
D037741:Fullerenes; D046911:Macromolecular Substances; D047250:Calixarenes; C069837:fullerene C60