Table 10.

Photophysical and photochemical parameters of 61o–68o in benzene solution.

Compd.	λmax/nm (ε/104 M−1 cm−1)	λem/nm	Φ oc	Φ co	Φf	τf (ns)	Solvent	Ref.
61o	295 (0.69), 402 (2.87)	496	-	-	0.007	2.09	benzene	[52]
62o	292(0.61), 399 (2.76)	478	0.022	0.012	0.247	1.00	benzene	[52]
63o	292 (0.86), 393 (3.30)	473	0.012	0.009	0.097	0.59	benzene	[52]
64o	292 (0.90), 397 (3.31)	468	0.027	0.016	0.262	1.03	benzene	[52]
65o	295 (0.52), 424 (2.18)	543	0.005	0.004	0.014	< 0.5	benzene	[52]
66o	291 (0.76), 417 (2.85)	522	0.025	0.005	0.178	1.52	benzene	[52]
67o	293 (0.75), 416 (2.47)	506	0.018	0.002	0.585	2.63	benzene	[52]
68o	295 (0.61), 420 (2.37)	505	0.038	0.014	0.556	2.27	benzene	[52]

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