Table 1.

Photophysical Properties of HPY Dyes^a

Dyea	λmax nm	ε M−1cm−1	λemib nm	Φf	Solvent
2	472	28 800	551	0.75	MeOH
4	491	26 800	563	0.69	MeOH
6	482	32 900	562	0.95	MeOH
8	490	26 600	562	0.71	MeOH
10	471	22 600	539	0.31	MeOH
12	491	33 800	572	0.37	MeOH
14	481	36 700	572	0.38	MeOH
16	403	8 500	493	0.21	MeOH
16	404	8 600	491	0.17	1%DMSO/PBSc
16	408	9 300	497	0.22	CH2Cl2
16	403	8 600	504	0.17	Acetone
16	406	9 800	500	0.07	Toluene
18	400	8 300	496	0.20	MeOH
21	403	12 000	492	0.21	MeOH
21	404	12 300	492	0.16	1%DMSO/PBSc
21	406	11 200	497	0.20	CH2Cl2
21	407	10 800	504	0.23	Acetone
21	410	10 600	501	0.51	Toluene
22	400	9 400	476	0.21	MeOH

^a20 μM samples were prepared.

^bSample was excited at λ_max.

^cpH 7.4.