Fig. 5: Electrochromic properties of NKM-908-TPDC-2OMe, NKM-908-TPDC-4F and NKM-908-TPDC-4Me thin films.

a, d, g CV curves for NKM-908-TPDC-2OMe, NKM-908-TPDC-4F and NKM-908-TPDC-4Me thin films in 0.1 M [(nBu)4N]PF6/DMF solution at 50 mV s−1 purged with N2 (The inset shows the installed TPDC-X ligands). b, e, h In-situ UV-vis absorption spectra of NKM-908-TPDC-2OMe, NKM-908-TPDC-4F and NKM-908-TPDC-4Me thin films in 0.1 M [(nBu)4N]PF6/DMF solution. c, f, i Optical images of NKM-908-TPDC-2OMe, NKM-908-TPDC-4F and NKM-908-TPDC-4Me thin films at various applied potentials (0 V, −0.6 V, and −1.4 V vs. Ag/AgCl) during CV scanning. Scale bars, 3 mm.