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Fullerene
About: Fullerene is a research topic. Over the lifetime, 12723 publications have been published within this topic receiving 359173 citations.
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TL;DR: Density functional calculations have been performed on Sc3N@C80 and Sc3n@C78 to examine the bonding between the scandium atoms and the fullerene cage.
Abstract: Density functional calculations have been performed on Sc3N@C80 and Sc3N@C78 to examine the bonding between the scandium atoms and the fullerene cage. The encapsulation of the Sc3N unit is a strongly exothermic process that is accompanied by a formal transfer of six electrons from the scandium atoms to the fullerene cage in both complexes. In the case of Sc3N@C78, the metal ions are strongly linked to three [6:6] ring junctions of three different pyracylene patches, which are located at the midsection of the fullerene cage. This bonding restricts the Sc3N unit from freely rotating inside the cage. Geometric optimization of the structure of Sc3N@C78 indicates that the carbon cage expands to accommodate the Sc3N unit within the cage. This optimized structure has been used to re-refine the crystallographic data for {Sc3N@C78}·{Co(OEP)}·1.5(C6H6)·0.3(CHCl3). In contrast, in Sc3N@C80, the Sc3N unit is not trapped in a specific position within the inner surface of the Ih cage, which is an unusual fullerene that...
182 citations
TL;DR: Four ionic fullerene derivatives, which are relatively soluble in polar solvents, are shown to organize into morphologically different nanoscale structures, and the efficient method to fabricate almost perfect and uniformly shaped nanotubular crystals opens the way to the possibility of exploiting the fullerenes properties at the nanometer scale.
Abstract: Four ionic fullerene derivatives, which are relatively soluble in polar solvents, are shown to organize into morphologically different nanoscale structures. Spheres, nanorods, and nanotubules form in water depending on the side chain appendage of the fullerene spheroid. Images at different nanoscale structures were obtained via transmission electron microscopy. Also, computer simulations were used for investigating the relative spatial arrangements. The efficient method to fabricate almost perfect and uniformly shaped nanotubular crystals, which order spontaneously by self-assembly, opens the way to the possibility of exploiting the fullerene properties at the nanometer scale.
180 citations
Book•
25 May 1995
TL;DR: Theoretical tools of fullerene research can be found in this article, where the C60 and C70 fullerenes have been studied, as well as the C76, C78, C82, and C84.
Abstract: 1: Preliminaries and historical overview. 2: Theoretical tools of fullerene research. 3: The C60 fullerene. 4: The C70 fullerene. 5: C76, C78, C82, and C84: The medium-size fullerenes. 6: Large spheroidal and tubular fullerenes, graphitic microtubules, and hypothetical polymeric allotropes of carbon. 7: Fullerenes with fewer than sixty carbon atoms. 8: Endohedral complexes. 9: Heterofullerenes and fullerene derivatives. 10: Solid-state properties of fullerenes and their drivatives. 11: Conclusions and future directions
179 citations
TL;DR: Investigation of the stability and aggregation kinetics of two different suspensions of fullerene (C60) nanoparticles and their relation to nanoparticle charge (electrokinetic) properties shows that both fulleren nanoparticles are more negatively charged and stable at higher pH conditions, suggesting that dissociation of surface functional groups contributes to surface charge for both nanoparticles.
Abstract: The stability and aggregation kinetics of two different suspensions of fullerene (C60) nanoparticles and their relation to nanoparticle charge (electrokinetic) properties were investigated. The two synthesis methods employed—a solvent exchange method involving sonication of fullerene initially dissolved in toluene and prolonged stirring of bulk fullerene in water—produce negatively charged fullerene nanoparticles. With an increase in electrolyte (KCl) concentration, the electrophoretic mobilities of both fullerene nanoparticles became less negative, while the corresponding aggregation rates increased until maximum rates were reached at their respective critical coagulation concentrations. This behavior is consistent with the classic Derjaguin−Landau−Verwey−Overbeek (DLVO) theory for the stability of charged colloidal particles. The nanoparticles prepared by prolonged stirring of bulk fullerene in water were much more stable than those prepared by sonication in toluene, as evident from their significantly ...
179 citations
TL;DR: The successful synthesis of Bi2S3 nanotubes highlights the feasibility of inorganic fullerene-like structures from other chemicals that possess layered crystalline structures, not only the well-known 2-D family, but possibly also those quasi-2-D members.
Abstract: Synthesis of Bi2S3 nanotubes from rolling of the quasi-two-dimensional (2-D) layered precursor represents new progress in the synthetic approach and adds new members to the present inorganic fullerene family. These nanotubes display multiwalled structures that resemble that of a multiwalled carbon nanotube. The successful synthesis of Bi2S3 nanotubes highlights the feasibility of inorganic fullerene-like structures from other chemicals that possess layered crystalline structures, not only the well-known 2-D family, but possibly also those quasi-2-D members.
178 citations