Table 8.

Photophysical and photochemical parameters of 44o–49o in benzene solution.

Compd.	λmax/nm (ε/104 M−1 cm−1)	λem/nm	Φ oc	Φ co	Conversion Yield (%)	Φf	Solvent	Ref.
44o	385 (0.59)	523	0.50	0.10	88	0.064	benzene	[45]
45o	333 (0.81), 410 (0.699)	543	0.87	0.44	51	0.032	benzene	[45]
46o	327 (0.792), 414 (0.975)	542	0.77	0.43	85	0.048	benzene	[45]
47o	310 (2.75), 419 (0.954)	562	0.35	0.042	78	0.011	benzene	[45]
48o	342 (0.656), 421 (1.64)	552	0.23	0.084	83	0.056	benzene	[45]
49o	310 (2.17), 411 (3.61)	645	0.35	0.087	84	0.006	benzene	[45]

λ_max: absorption maximum; ε: molar absorption coefficient; Φ_oc: cyclization quantum yield; Φ_co: cycloreversion quantum yield; conversion yield: conversion ratio from open form to closed from at PSS state; Φ_f: fluorescence quantum yield.