Photoswitching behavior of the model compounds 1a–1d.

Compounds	R1/R2	PSS (E/Z)	Light sources
1a	H/H	73/27	λ 2 > 525 nm
		44/56	λ 1 = 400 nm
1b	F/H	73/27	λ 2 = 460 nm
		26/74	λ 1 = 350 nm
1c	H/F	65/35	λ 2 > 525 nm
		44/56	λ 1 = 400 nm
1d	F/F	64/36	λ 2 = 460 nm
		30/70	λ 1 = 350 nm