Cyclohexanohemicucurbit[8]uril Inclusion Complexes With Heterocycles and Selective Extraction of Sulfur Compounds From Water

Tatsiana Shalima, Kamini A. Mishra, Sandra Kaabel, Lukas Ustrnul, Simona Bartkova, Kaia Tõnsuaadu, Ivo Heinmaa, Riina Aav*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Solid-phase extraction that utilizes selective macrocyclic receptors can serve as a useful tool for removal of chemical wastes. Hemicucurbiturils are known to form inclusion complexes with suitably sized anions; however, their use in selective binding of non-charged species is still very limited. In this study, we found that cyclohexanohemicucurbit[8]uril encapsulates five- and six-membered sulfur- and oxygen-containing unsubstituted heterocycles, which is investigated by single-crystal X-ray diffraction, NMR spectroscopy, isothermal titration calorimetry, and thermogravimetry. The macrocycle acts as a promising selective sorption material for the extraction of sulfur heterocycles, such as 1,3-dithiolane and α-lipoic acid, from water.

Original languageEnglish
Article number786746
JournalFrontiers in Chemistry
Volume9
DOIs
Publication statusPublished - 3 Dec 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Hemicucurbituril
  • heterocycles
  • inclusion complex
  • lipoic acid
  • MAS NMR
  • SC-XRD
  • solid-phase extraction
  • sorbent recycling

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