Dimeric molecular capsules under redox control

Kwangyul Moon, Angel E. Kaifer

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


A new tetraferrocenylurea calix[4]arene was prepared in order to investigate its dimerization properties. 1H NMR spectroscopic data clearly established that this calixarene forms stable dimeric molecular capsules in chloroform solution. The dimeric capsules are stabilized by the formation of multiple hydrogen bonds between the urea functional groups on the calixarene upper rims. In the dimer, eight ferrocene groups are held in proximity to the "seam" of hydrogen bonds. Upon oxidation of the ferrocene residues, electrochemical, PGSE NMR, and IR spectroscopic data revealed that the hydrogen bonds are broken, leading to the dissociation of the dimeric molecular capsule.

Original languageEnglish (US)
Pages (from-to)15016-15017
Number of pages2
JournalJournal of the American Chemical Society
Issue number46
StatePublished - Nov 24 2004

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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