TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The pendant cyclic ether is cyclohexene oxide, cyclopentene oxide or epoxy group. The pendant cyclic ether and fullerene are spaced apart by greater than or equal to 1 or greater than or equal to 3 carbon atom, or ester group. The reaction product comprises ether group(s), or at least two pendant fullerenes, or repeating units, each repeating unit having pendant fullerene. The mixture further comprises a solvent. Preferred Compositions: The pendant cyclic ether comprises a cyclic group having Nc carbon atoms and No oxygen atoms, where Nc is greater than or equal to 2 and No greater than or equal to 1. The Nc is 4 or 3, and No is 1. Preferred Method: The composition is prepared from a mixture having fullerene derivative(s), and first conducting polymer or precursor.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The composition further comprises a first conducting polymer of polyacetylene, polyphenylacetylene, polydiphenylacetylene, polyaniline, poly(p-phenylene vinylene), polythiophene, polyporphyrins, porphyrinic macrocycles, thiol derivatized polyporphyrins, polymetallocenes, polyphthalocyanines, polyvinylenes, or its derivatives. The first conducting polymer or precursor comprises cyclic ether to react with pendant cyclic ether of fullerene derivatives. The mixture further comprises a second conducting polymer or precursor. The second conducting polymer or precursor comprises cyclic ether configured to react with the pendant cyclic ether of the first conducting polymer or precursor. The first conducting polymer or precursor comprises thiophene, polythiophene, or its derivative. EXAMPLE - Methyl 4-benzoylbutyrate p-tosylhydrazone (PCBM) (1 g) was dissolved in 1,2-dichlorobenzene to prepare a first mixture. Acetic acid, (100 ml) and concentrated hydrochloric acid (40 ml) were added to first mixture to prepare a second mixture, and heated to reflux for 20 hours. Solvent was removed from refluxed second mixture and residue was suspended in methanol to form third mixture. Precipitates were collected from third mixture by filtration and dried under vacuum. The precipitates included 95% carboxylic acid (0.94 g). The carboxylic acid was suspended in dry carbon disulfide (300 ml) under nitrogen and thionyl chloride (300 ml) was added to prepare fourth mixture. The fourth mixture was heated to reflux for 18 hours and volatile components were removed using rotary evaporator leaving behind second residue. Dry toluene (100 ml), pyridine (4 ml), and glycidol (200 mg) were combined with second residue to prepare a fifth mixture, and stirred at room temperature for 20 hours. After stirring, solvents were removed leaving third residue. The third residue was purified by flash chromatography using initial solvent mixture of dichloromethane:hexane in a 1:4 ratio and ramping up to 4:1 ratio to provide 203 mg 61C-phenyl-butyric acid glycidol ester (PCBG). The yield was 25% from carboxylic acid and 23% from PCBM.