Nature Communications (Dec 2023)

Electrosynthesis of buckyballs with fused-ring systems from PCBM and its analogue

  • Wei-Feng Wang,
  • Kai-Qing Liu,
  • Chuang Niu,
  • Yun-Shu Wang,
  • Yang-Rong Yao,
  • Zheng-Chun Yin,
  • Muqing Chen,
  • Shi-Qi Ye,
  • Shangfeng Yang,
  • Guan-Wu Wang

DOI
https://doi.org/10.1038/s41467-023-43774-2
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 8

Abstract

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Abstract [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM), a star molecule in the fullerene field, has found wide applications in materials science. Herein, electrosynthesis of buckyballs with fused-ring systems has been achieved through radical α-C−H functionalization of the side-chain ester for both PCBM and its analogue, [6,6]-phenyl-C61-propionic acid methyl ester (PCPM), in the presence of a trace amount of oxygen. Two classes of buckyballs with fused bi- and tricyclic carbocycles have been electrochemically synthesized. Furthermore, an unknown type of a bisfulleroid with two tethered [6,6]-open orifices can also be efficiently generated from PCPM. All three types of products have been confirmed by single-crystal X-ray crystallography. A representative intramolecularly annulated isomer of PCBM has been applied as an additive to inverted planar perovskite solar cells and boosted a significant enhancement of power conversion efficiency from 15.83% to 17.67%.