Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India.
Angew Chem Int Ed Engl. 2021 Jun 14;60(25):14109-14116. doi: 10.1002/anie.202103822. Epub 2021 May 14.
Fullerene extracts obtained from fullerene soot lack their real application due to their poor solubility in common solvents and difficulty in purification. Encapsulation of these extracts in a suitable host is an important approach to address these issues. We present a new Pd barrel (1), which is composed of three 1,4-dihydropyrrolo[3,2-b]pyrrole panels, clipped through six cis-Pd acceptors. Large open windows and cavity make it an efficient host for a large guest. Favorable interactions between the ligand and fullerene (C and C ) allows the barrel to encapsulate fullerene efficiently. Thorough investigation reveals that barrel 1 has a stronger binding affinity towards C over C , resulting in the predominant extraction of C from a mixture of the two. Finally, the fullerene encapsulated barrels C ⊂1 and C ⊂1 were found to be efficient for visible-light-induced singlet oxygen generation. Such preferential binding of C and photosensitizing ability of C ⊂1 and C ⊂1 are noteworthy.
由于富勒烯烟灰中获得的富勒烯提取物在常见溶剂中的溶解度差且难以纯化，因此缺乏实际应用。将这些提取物封装在合适的主体中是解决这些问题的重要方法。我们提出了一种新的钯桶（1），它由三个 1,4-二氢吡咯并[3,2-b]吡咯板组成，通过六个顺式-Pd 受体夹在一起。大的开口窗和空腔使其成为容纳大客体的有效主体。配体与富勒烯（C 和 C ）之间的有利相互作用允许桶有效地封装富勒烯。彻底的研究表明，桶 1 对 C 的结合亲和力强于 C ，导致从两者的混合物中优先提取 C 。最后，发现封装了富勒烯的桶 C ⊂1 和 C ⊂1 可有效地用于可见光诱导的单线态氧生成。值得注意的是，C 的这种优先结合以及 C ⊂1 和 C ⊂1 的光敏能力。
