Table 9.

Photophysical and photochemical parameters of 50o–60o in benzene solution.

Compd.	λmax/nm (ε/104 M−1 cm−1)	λem/nm	Φ oc	Φ co	Φf	τf (ns)	Solvent	Ref.
50o	289 (0.63), 342 (0.92), 417 (2.15)	502	0.39	0.0005	0.167	2.44	benzene	[50]
51o	287 (0.75), 364 (0.80), 434 (2.42)	517	0.35	0.0004	0.161	2.66	benzene	[50]
52o	298 (0.88), 450 (2.00)	513	-	-	0.02	< 0.5	benzene	[51]
53o	300 (0.90), 451 (2.30)	511	-	-	0.03	< 0.5	benzene	[51]
54o	316 (0.88), 460 (2.92), 490 (3.82)	513	-	-	0.06	< 0.5	benzene	[51]
55o	303 (0.68), 360 (0.99), 448 (2.90)	526	0.12	0.004	0.39	3.07	benzene	[51]
56o	305 (0.58), 372 (0.78), 460 (2.88)	529	0.12	0.002	0.40	2.94	benzene	[51]
57o	316 (0.65), 380 (0.64), 492 (4.42)	545	0.05	0.003	0.30	1.63	benzene	[51]
58o	300 (0.89), 383 (0.74), 466 (2.83)	545	0.15	0.004	0.32	3.19	benzene	[51]
59o	310 (0.99), 391 (0.93), 475 (4.23)	554	0.14	0.002	0.36	3.70	benzene	[51]
60o	318 (0.64), 405 (0.58), 510 (4.07)	557	0.03	0.004	0.34	2.04	benzene	[51]

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.