Table 2.

Photophysical and photochemical parameters of 8o–10o in solution.

Compd.	λmax/nm (ε/104 M−1 cm−1)	Φ oc	Φ co	λPL	Φ f	Solvent	Ref.
8o	372 (6.33)	0.34		466	0.1941	CHCl3	[25]
8c	516 (2.57)		0.02	-	-	CHCl3	[25]
8o+H+	378	-		476	0.0644	CHCl3	[25]
8c+H+	749 (0.68); 754 (0.67); 751 (0.22)	-		-	-	CHCl3	[25]
9o	375 (5.62)	0.30		433	0.0973	THF	[26]
9c	518 (2.56)		0.01	-	-	THF	[26]
10o	374 (4.68)	0.40		436	0.0767	THF	[26]
10c	517 (1.86)		0.02	-	-	THF	[26]

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