Unexpected Colloidal Stability of Fullerenes in Dimethyl Sulfoxide and Related Systems.

It is known that fullerenes are poorly soluble in polar solvents, but readily form colloidal solutions in such media. These solutions are typically solvophobic (hydrophobic when prepared in water), that is, thermodynamically unstable colloidal systems with negatively charged particles. To understand the stability factors of a colloidal system, the thresholds for coagulation of a sol or suspension by electrolytes are of key importance.

Formation, Stability, and Coagulation of Fullerene Organosols: C in Acetonitrile-Toluene Solutions and Related Systems.

This paper is aimed at better understanding the nature of C aggregates in organic solvents. As liquid media, acetonitrile-toluene mixed solvents were chosen. At a high content of CHCN, e.