6.

Cyclic voltammograms (CV) for: (a) Fc( l -1) 2 (10 cycles); (b) Fc 3 ( l -2) 2 (10 cycles); (c) overlay of CVs of various building blocks (0.1 mM in DCM containing 0.1 M mM Bu4NPF6 as supporting electrolyte, scan rate 10 mV s–1); (d) comparison of CD spectra of Fc 3 ( l -2) 2 before and after electrochemical oxidation (5 × 10–5 M in DCM/0.1 M Bu4NPF6).