Cucurbituril complexes of redox active guests

Suresh Gadde, Angel E. Kaifer

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

This review summarizes recent work on the chemistry of inclusion complexes formed between redox active guests and cucurbit[n]uril hosts. The large majority of the surveyed research concerns the hosts cucurbit[7]uril (CB7) and cucurbit[8]uril (CB8), while the guests are 4,4'-bipyridinium (viologen) and ferrocene derivatives. The work includes dendronized guests, in which a guest residue is attached to a dendron in such a way that host-guest binding interactions are still possible. The main focus of the review is on the electrochemical behavior of the included guests. In general terms complexation by CB7 has a more pronounced effect on the ferrocene derivatives, giving rise to a measurable attenuation of the electrochemical kinetics. In contrast to this, the electrochemical kinetics of the viologen derivatives remains fast (in the voltammetric time scale, with scan rates up to 2 V s-1) upon inclusion complexation by CB7. The larger cavity host CB8 is extremely effective at mediating the redox-driven self-assembly of dendronized viologens.

Original languageEnglish (US)
Pages (from-to)27-38
Number of pages12
JournalCurrent Organic Chemistry
Volume15
Issue number1
DOIs
StatePublished - Jan 28 2011

Keywords

  • Cobaltocenium
  • Cucurbituril hosts
  • Electrochemistry
  • Ferrocene
  • Host-guest complexes
  • Viologen

ASJC Scopus subject areas

  • Organic Chemistry

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