Figure 4
F−-azo-NDI complex.
(a) The UV-vis spectra (shown in “a”) at detected oxidation states. (b) Inset in “a” is visual colour change of azo-NDI at the native, radical ion and dianion states. (c) Cyclic voltammetry (CV) of compound azo-NDI (1) in DMF (2 mM) with 0.1 M tetrabutyl ammonium hexafluorophosphate (TBAPF6) supporting electrolyte. (d) Electron paramagnetic resonance (EPR) of the radical ion and dianion species of azo-NDI. (e) ESI-MS of cis-azo-NDI at the native, cis-azo-NDI with 1xF− and with 2 × F−, respectively.
