Table 1.

Photophysical properties of o-DAPA, m-DAPA, p-DAPA, and 4–10.

	FW	λabsa (nm)	ε (M − 1 cm−1)	λem(nm)	Δv (cm−1)	ΦFb	τ (ns)	kr (107 s−1)	knr (107 s−1)
o-DAPA	192.22	432	5160	531	4320	0.26	6.44	4.0	12
m-DAPA	192.22	350	7050	-	-	-	-	-	-
p-DAPA	192.22	482	2890	618	4570	0.06	1.84	3.3	51
4	436.46	370	3410	471	5800	0.18	5.83	3.1	14
5	276.29	405	5810	502	4770	0.73	8.93	8.1	3.1
6	392.45	416	6670	518	4730	0.61	9.09	6.7	4.3
7	334.38	435	7210	543	4570	0.29	6.14	4.7	12
8	234.26	445	3990	556	4490	0.30	5.93	5.0	12
9	292.34	446	3660	566	4750	0.27	4.89	5.5	15
10	263.30	456	5070	581	4720	0.23	2.96	7.7	26

^aThe longest absorption maximum wavelengths. ^bAbsolute fluorescence quantum yields determined by a calibrated integrating sphere system. All measurements are made for CHCl₃ solution samples.