AQUEOUS MOLECULAR-COLLOIDAL SOLUTION OF AT LEAST ONE HYDRATED FULLEREN Russian patent published in 2003 - IPC

FIELD: carbon materials. SUBSTANCE: aqueous molecular-colloidal solutions (C_NFWS) of hydrated fullerens contain, in particular, their spherical fractal clusters, wherein hydrated fullerens are supramolecular complexes having general formula: wherein N≥60;(m+n)≥20;m>1;n>1. In these complexes at least part of counterions are substituted, in particular, by following metal ions: K⁺,Na⁺,Ca²⁺,Mg²⁺,La³⁺,Fe³⁺,Th⁴⁺. Concentration of metal ions does not exceed coagulation threshold of such solutions. Solutions according to invention can be prepared by titration of C₆₀FWS solutions with alkali, e.g., NaOH, solutions or by cation-exchange technique on ion-exchange resins passing C₆₀FWS solutions through K⁺-form cationite column. EFFECT: increased stability of molecular-colloidal solutions, which do not change their physicochemical properties during three years or longer. 6 cl, 1 tbl, 2 ex