Oligomeric ferrocene rings

Michael S. Inkpen, Stefan Scheerer, Michael Linseis, Andrew J. P. White, Rainer F. Winter, Tim Albrecht, Nicholas J. Long

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


Cyclic oligomers comprising strongly interacting redox-active monomer units represent an unknown, yet highly desirable class of nanoscale materials. Here we describe the synthesis and properties of the first family of molecules belonging to this compound category—differently sized rings comprising only 1,1′-disubstituted ferrocene units (cyclo[n], n = 5–7, 9). Due to the close proximity and connectivity of centres (covalent Cp–Cp linkages; Cp = cyclopentadienyl) solution voltammograms exhibit well-resolved, separated 1e– waves. Theoretical interrogations into correlations based on ring size and charge state are facilitated using values of the equilibrium potentials of these transitions, as well as their relative spacing. As the interaction free energies between the redox centres scale linearly with overall ring charge and in conjunction with fast intramolecular electron transfer (∼107 s−1), these molecules can be considered as uniformly charged nanorings (diameter ∼1–2 nm).
Original languageEnglish
Pages (from-to)825-830
JournalNature Chemistry
Issue number9
Publication statusPublished - 27 Jun 2016


Dive into the research topics of 'Oligomeric ferrocene rings'. Together they form a unique fingerprint.

Cite this