Table 3.

Characterization of CRaB Analogues and Unrestricted Aza-BODIPY Parent Compounds in Chloroform^a

	unrestricted					CRaB
	λabs (nm)	λem (nm)	ε (M−1·cm−1)	Φ	PA	λabs (nm)	λem (nm)	ε (M−1·cm−1)	Φ	PA
HyPb	670	697	1.50 × 104	0.472	145.84	691	713	2.95 × 104	0.574	177.84
red-HyPc	760	798	5.40 × 104	0.043	839.23	789	822	1.35 × 105	0.054	2667.97
PhotoNODb	682	715	5.59 × 104	0.432	374.06	700	728	9.21 × 104	0.393	756.71
RNODc	734	771	6.34 × 104	0.108	1,099.30	761	790	9.35 × 104	0.096	1228.32
OMe-APCb	672	702	6.98 × 104	0.699	609.09	687	714	1.13 × 105	0.646	1038.26
t-OMe-APCc,d	753	795	7.95 × 104	0.003	2,002.18	780	814	1.13 × 105	0.011	2756.02

^aPA signals were acquired for 10 μM solutions and were measured in a tissue-mimicking phantom.

^bFluorescence quantum yields were measured using a known methoxy-substituted tetraaryl aza-BODIPY as a reference.^40,44

^cFluorescence quantum yields were measured using ICG as a reference.

^dSolvent was supplemented with 1% Et₃N.