To explore potential applications for open-cage fullerenes, we employed 4-((6-bromohexyl)oxy)aniline to react with an open-cage fullerene precursor which has an 11-membered orifice and prepared open-cage fullerenes with an 18-membered orifice. The bromo atom at the end of the hexyl chain in these open-cage compounds could be easily replaced by alkoxyl groups to further extend the linear chain. The results also show that the presence of the alkyl chain slightly changes the reactivity of the orifice-expansion reaction.

中文翻译：

---

长尾开放笼式富勒烯的合成

为了探索开笼式富勒烯的潜在应用，我们使用了4-（（6-溴己基）氧基）苯胺与具有11元孔的开笼式富勒烯前体反应，并制备了具有18元开孔的富勒烯。孔。这些开笼化合物中己基链末端的溴原子很容易被烷氧基取代，以进一步延伸线性链。结果还表明，烷基链的存在稍微改变了孔口膨胀反应的反应性。