Table 2. Photophysical Parameters of 3″ and 5a–5c.

	Δνa/cm–1	ΦFb	ΦISCc	τFd/ns	kre/108 s–1	knrf/108 s–1
5a	364	0.88		4.9	1.8	0.24
5b	403	0.84	0.001	4.6	1.8	0.35
5c	344	0.84	0.002	4.1	2.0	0.39
3″	284	0.76		3.6	2.1	0.67

^aStokes shift.

^bFluorescence quantum yield.

^cISC quantum yield.

^dFluorescence lifetime.

^eRadiative decay constant.

^fNonradiative decay constant.