Chemists Find Too Much Air Sticks Precious Carbon Footballs Together

The research chemists Dr Thomas Drewello at the University of Warwick, Dr Roger Taylor at Sussex, and University of Warwick PhD student Mark P. Barrow have discovered that even at normal - ambient temperatures, two of the football-like carbon structures composed of sixty carbon atoms (C₆₀) can become attached, fixed together by a single oxygen atom which acts as a bridge between the two, forming C₁₂₀O (see diagram). This obviously calls into question whether one can rely on this form of carbon to carry out particular engineering or chemical roles at normal temperatures when oxygen is present.

The researchers analysed thirteen different samples of solid state C₆₀ and found C₁₂₀O was present in concentrations of up to about 1% in every sample that degraded, which is sufficient to cause concern for anyone relying on C₆₀ to remain stable under normal conditions. The researchers believe that this change from C₆₀ to C₁₂₀O is caused by a reaction known as "cycloaddition." The discovery suggests that fullerenes will need protection from oxidation in any application in future.