Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 7, 2014
Previous Article Next Article

An electrochemically switchable foldamer – a surprising feature of a rotaxane with equivalent stations

Author affiliations

Abstract

A novel, mechanically interlocked molecular device was obtained from unique supramolecular tectons – π-deficient tetraazamacrocyclic complexes of copper(II) and nickel(II). We present the synthesis of the first rotaxanes based on donor–acceptor interactions involving transition metal complexes. While spontaneous shuttling manifests itself in the variability of the NMR spectra, voltammetric experiments reveal a surprising mode of potential-controlled molecular switching, which does not employ common co-conformational changes. Significantly, it relies on reversible folding/unfolding of the rotaxane. The process is driven by the interplay between electrostatic repulsion and cohesive π–π interaction – a tug of war with a critical point at 1.31 V. Although rotaxanes with equivalent stations are considered degenerate molecular shuttles, we show that this is not the case when an unusual mechanism of switching is involved.

Graphical abstract: An electrochemically switchable foldamer – a surprising feature of a rotaxane with equivalent stations

Back to tab navigation

Supplementary files

Article information


Submitted
10 Feb 2014
Accepted
20 Mar 2014
First published
25 Mar 2014

Chem. Sci., 2014,5, 2836-2842
Article type
Edge Article

An electrochemically switchable foldamer – a surprising feature of a rotaxane with equivalent stations

M. Woźny, J. Pawłowska, A. Osior, P. Świder, R. Bilewicz and B. Korybut-Daszkiewicz, Chem. Sci., 2014, 5, 2836
DOI: 10.1039/C4SC00449C

Social activity

Search articles by author

Spotlight

Advertisements