Molecular jail-making

Article Abstract:

Gas-phase synthesis of fullerene endohedral metal complexes provides several advantages over the production of endohedral fullerenes using arc-discharge vaporization of doped graphite. This method is based on the ability of cyclic polyynes to rearrange themselves into fullerenes in the gas phase. Progress in the applicability of fullerenes and their derivatives can only be achieved if large quantities of these species are freely available. The gas-based strategy provides fullerenes with a 7-Angstrom-diameter internal cavity that can serve as a container for atoms.

Observations, Coordination compounds, Cyclic compounds

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Structural distortion in Rb3C60 revealed by 87Rb NMR

Article Abstract:

A study of the structure of alkali-intercalated A(sub x)C60 fullerides (where A is an alkali metal and x = 2,3,4,6) is reported. The study protocol involved the use of 87-Rb nuclear magnetic resonance studies of Rb3C60. The results revealed the expected ratio of two tetrahedral and one octahedral Rb per C60 at 440 degrees Kelvin. However, an additional resonance appears at temperatures below 370 degrees Kelvin which arises from a second type of tetrahedral Rb+ site. Two models are presented to explain this phenomenon.

Research, Usage, Nuclear magnetic resonance

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Experimental evidence for the formation if fullerenes by collisional heating of carbon rings in the gas phase

Article Abstract:

Fullerenes are present near C30 in laser desorption experiments sans graphitic blocks. The propensity for C60 (buckminsterfullerene) formation in carbon arc rectors are defined by the ring-fullerene isomerization mechanism. Heat application on ring transformation from linear chains to planar ring systems to three-dimensional near-spherical fullerenes are analyzed. The latest discovery of C60 and attempts to produce it in large quantities, triggered many studies on its unique chemical and formation properties.

Carbon compounds

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