Table 5.

Spectroscopic Properties of Selected Polyenes^a

#	Name	Solvent	λmax (ε)	λem	Φ	τ
4.34b	Retinol	MeOH	-	-	0.007	1.5
		cyclohexane	325	520	0.020	5.0
4.35c	cis-PnA	MeOH	318.6, 303.8 (79)b	‘432’d	0.017	1.3
		decane	320,8, 305.8 (74)	432	0.054	5.2
4.36e	trans-PnA	MeOH	313.0, 298.6 (92)	‘422’d	0.031	<1
		decane	315.3, 300.7 (88)	422	0.009	3.1
4.37d	trans-PA	EtOH	344.7 (103)	468	0.075	10.7
		dioxane	348.9 (81)	468	0.14	13.7
4.38e	trans-PdA	CHCl3	353 (92), 335 (95), 320 (60)	474	0.14g	-

^aλ, ε, and τ are given in nm, 10³ M⁻¹cm⁻¹, and ns respectively

^bData from Radda and Smith.²⁰⁵

^cData from Diamond et al.²¹³

^dThe emission maximum as virtually solvent independent.²¹³

^eData from Acuna et al., average lifetimes given.²¹⁴

^fData from Acuna et al.²¹⁵

^gQuantum yield in DMPC vesicles.²¹⁵