Table 5. Spectral Properties of Fluorophores^a.

compd	λmax (nm)	λem (nm)	ε (M–1 cm–1)	Φ
3a	314	398	11700	0.08
3b	344	nd	15600	<0.01
3c	308	419	14700	0.10
3c′	331	420	9800	0.26
3d′	303	412	16800	0.06
3f	303	418	13400	0.17
3g	309	nd	15300	<0.01
3h	317	408	12600	0.11
3w	301	434	7700	0.14
3v	309, 351	438	14300, 8900	0.08

^aFluorescence measurements taken in 10 mM HEPES pH 7.3. Full spectra are given in the Supporting Information.