Supramolecular soft and hard materials based on self-assembly algorithms of alkyl-conjugated fullerenes.
Dimensionally controlled and hierarchically assembled supramolecular architectures in nano/micro/bulk length scales are formed by self-organization of alkyl-conjugated fullerenes. The simple molecular design of covalently attaching hydrophobic long alkyl chains to fullerene (C(60)) is different from the conventional (hydrophobic-hydrophilic) amphiphilic molecular designs. The two different units of the alkyl-conjugated C(60) are incompatible but both are soluble in organic solvents. The van der Waals intermolecular forces among long hydrocarbon chains and the pi-pi interaction between C(60) moieties govern the self-organization of the alkyl-conjugated C(60) derivatives. A delicate balance between the pi-pi and van der Waals forces in the assemblies leads to a wide variety of supramolecular architectures and paves the way for developing supramolecular soft materials possessing various morphologies and functions. For instance, superhydrophobic films, electron-transporting thermotropic liquid crystals and room-temperature liquids have been demonstrated. Furthermore, the unique morphologies of the assemblies can be utilised as a template for the fabrication of nanostructured metallic surfaces in a highly reproducible and sustainable way. The resulting metallic surfaces can serve as excellent active substrates for surface-enhanced Raman scattering (SERS) owing to their plasmon enhancing characteristics. The use of self-assembling supramolecular objects as a structural template to fabricate innovative well-defined metal nanomaterials links soft matter chemistry to hard matter sciences.
Nakanishi
Takashi
T
National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan. NAKANISHI.Takashi@nims.go.jp
D000465:Algorithms; D037741:Fullerenes / Q000737:chemistry*; D046911:Macromolecular Substances / Q000138:chemical synthesis / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D009930:Organic Chemicals / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry; D010316:Particle Size; D013499:Surface Properties
D037741:Fullerenes; D046911:Macromolecular Substances; D009930:Organic Chemicals; D009942:Organometallic Compounds; C069837:fullerene C60