Pillar[6]quinone: facile synthesis, crystal structures and electrochemical properties

A novel electron-deficient macrocycle, pillar[6]quinone (P[Q](6)), has been synthesized for the first time by both chemical and electrochemical oxidation of pillar[6]arene, showing clear hexagonal columnar stacking in the solid state. Cathodic voltammetric studies of P[Q](6) revealed that three electrons are injected first, followed by stepwise one-electron reductions.

一种新型缺电子大环化合物柱[6]醌（P[Q](6)）首次通过柱[6]芳烃的化学氧化和电化学氧化合成，在固态下呈现出清晰的六方柱状堆积。对P[Q](6)的阴极伏安研究表明，首先注入三个电子，随后逐步进行单电子还原。