Fig. 3: Photoisomerization of BMS.

a Schematic illustration of the photoisomerization reaction of BMS. Light bulb designed by Dr. Roza R. Weber. b UV-Vis spectra of an (E/Z)-BMS DCM solution upon 365 nm light irradiation (70 μm, 25 °C). c Selected regions of ¹H NMR spectral change of an (E/Z)-BMS solution upon 365 nm light irradiation for 10 min (500 MHz, 4.0 mm in CD₂Cl₂, 25 °C). d The concentration change of (E/Z)-BMS upon 365 nm irradiation for 1 h was determined by the integration of proton H_a in the ¹H NMR spectra. For the full ¹H NMR spectra, see Supplementary Fig. 5.