TABLE 1.

Absorption and emission properties of compounds 1–10, 1B–10B in CH₃CN.

Compds	λabs	ε	λem	λex	Stokes shift	ΦF
	(nm)	(M−1cm−1)	(nm)	(nm)	(nm)
1	368	14,600	602	374	228	0.05
1B a	—	—	—	—	—	—
2	327	17,300	506	338	168	0.04
2B	327	10,300	408	358	50	0.06
3	334	22,700	442	387	55	0.03
3B	334	18,400	403	351	52	0.27
4	335	28,800	437	388	49	0.06
4B	350	9,690	407	359	48	0.85
5	353	21,800	399	346	53	0.10
5B	392	13,500	414	391	23	0.68
6	286	23,400	499	334	165	0.07
6B a	—	—	—	—	—	—
7	340	15,200	399	342	57	0.02
7B	340	17,100	502	318	184	0.24
8	342	15,300	379	360	19	0.03
8B	341	5,730	412	361	51	0.22
9	360	13,300	401	342	59	0.06
9B	360	8,560	482	389	93	0.26
10	354	4,670	472	354	118	0.03
10B	365	1,210	597	437	160	0.06

^aNot detected due to poor solubility.