Figure 6.

Photochemical isomerization processes of (E_MZ_M)-1. A sample enriched with (E_MZ_M)-1 irradiated with 455 nm light for 140 min at −85 °C, in the dark for 10 min at −85 °C and subsequently warmed up to room temperature. The kinetic traces were followed using ¹⁹F NMR spectroscopy (470 MHz, 11 mM in CD₂Cl₂) (top). Motor operation overview under the illumination of (E_MZ_M)-1 at −85 °C (bottom). The enrichment of the sample with (E_MZ_M)-1 was achieved by thermal relaxation of the pre-irradiated PSS mixture (with 455 nm light at −85 °C) at −55 °C.