Table 1.

Photophysical and photochemical parameters of 1o–7o in solution.

Compd.	λmax/nm (ε/104 M−1 cm−1)	Φ oc	λPL	Φ f	Solvent	Ref.
1o	372 (5.3), 445	-	-	-	cyclohexane	[19]
2o	391(5.6), 475	-	-	-	cyclohexane	[19]
3o	431 (-)	-	490	0.26	MeCN	[22]
4o	436 (-)	-	499	0.18	CHCl3	[23]
5o	330 (2.4), 374 (2.5)	0.23	-	-	1,4-dioxane	[24]
6o	330 (2.3), 375 (2.3)	0.30	-	-	1,4-dioxane	[24]
7o	330 (2.3), 377 (2.6)	0.32	-	-	1,4-dioxane	[24]

λ_max: absorption maximum; ε: molar absorption coefficient; Φ_oc: cyclization quantum yield; λ_PL: fluorescence maximum; Φ_f: fluorescence quantum yield.