A series of [6, 6]-phenyl C61-butyric acid esters, including methanofullerene [6, 6]-phenyl C61-butyric acid methyl ester (PCBM) with different alkyl chain lengths (C1-C16) was synthesized from the reaction of C60 and alkyl 4-benzoylbutyrate p-tosylhydrazone in the presence of sodium methylate. The solubility of C60 derivatives in organic solvents increased with the increase in the length of alkyl substitutions. Photovoltaic cells with ...
![[6,6]-Phenyl C{61} butyric acid methyl ester Structure](https://image.chemsrc.com/caspic/201/160848-22-6.png)