Semiconducting and Metallic [5,5] Fullertube Nanowires: Characterization of Pristine D(1)-C and D(1)-C.

Although fullerenes were discovered nearly 35 years ago, scientists still struggle to isolate "single molecule" tubular fullerenes larger than C. In similar fashion, there is a paucity of reports for pristine single-walled carbon nanotubes (SWNTs). In spite of Herculean efforts, the isolation and properties of pristine members of these carbonaceous classes remain largely unfulfilled.

Fullertubes: Cylindrical Carbon with Half-Fullerene End-Caps and Tubular Graphene Belts, Their Chemical Enrichment, Crystallography of Pristine C-(1) and C-(1) Fullertubes, and Isolation of C, C, C, and C Cages of Unknown Structures.

We report a chemical separation method to isolate : a new and soluble allotrope of carbon whose structure merges nanotube, graphene, and fullerene subunits. Fullertubes possess single-walled carbon nanotube belts resembling a rolled graphene midsection, but with half-fullerene end-caps. Unlike nanotubes, fullertubes are reproducible in structure, possess a defined molecular weight, and are soluble in pristine form.

Isolation and Crystallographic Characterization of Two, Nonisolated Pentagon Endohedral Fullerenes: Ho N@C (22010)-C and Tb N@C (22010)-C.

Purified samples of Ho N@C (22010)-C and Tb N@C (22010)-C have been isolated by two distinct processes from the rich array of fullerenes and endohedral fullerenes present in carbon soot from graphite rods doped with Ho O or Tb O . Crystallographic analysis of the endohedral fullerenes as cocrystals with Ni(OEP) (in which OEP is the dianion of octaethylporphyrin) shows that both molecules contain the chiral C (22010)-C cage. This cage does not obey the isolated pentagon rule (IPR) but has two sites where two pentagons share a common C-C bond.

Identifying a Needle in a Haystack: Isolation and Structural Characterization of Er C as the Carbide Er C @D (85)-C.

A method has been developed for isolating a pure sample of Er C from the myriad of fullerenes and endohedral fullerenes that are formed in the electric arc process. Crystallographic analysis of Er C in a cocrystal formed with Ni(OEP) reveals that the molecule is the carbide Er C @D (85)-C . Crystals of Er C @D (85)-C ⋅Ni(octaethylporphyrin)⋅2 C H are isostructural with those of Sm @D (85)-C ⋅Ni(octaethylporphyrin)⋅2 (chlorobenzene).