Table 1.
Compound |
λ max [a] [nm] |
ϵ(375)[b] [m −1 cm−1] |
ϵ(405)[b] [m −1 cm−1] |
ϵ(430)[b] [m −1 cm−1] |
S [c] [%] |
φ u(λ irr)[d] |
ϵφ u(λirr ) [m −1 cm−1] |
---|---|---|---|---|---|---|---|
2 b [e] |
388 |
8100 |
7100 |
2600 |
94 |
4.51×10−4 (405) |
4 (405) |
1 b [f] |
386 |
22900 |
18000 |
4000 |
88 |
3.20×10−2 (375) |
687 (375) 120 (430) |
1 c [f] |
488 |
1700 |
2900 |
7900 |
70 |
2.35×10−2 (430) |
34 (375) 158 (430) |
1 d [f] |
386 |
11000 |
8700 |
1900 |
100 |
3.46×10−2 (375) |
330 (375) |
1 e [f] |
386 |
15900 |
12000 |
2300 |
95 |
1.01×10−2 (430) |
159 (375) 23 (430) |
2 c [f] |
385 |
13100 |
9500 |
1700 |
100 |
1.33×10−2 (430) |
17 (430) |
[a] Long‐wavelength absorption maxima. [b] ϵ(λ irr)=Molar extinction coefficient at irradiation wavelength λirr. [c] S=Stability against hydrolysis in the dark after 24 h (in % of remaining compound). [d] φ u(λ irr)=Uncaging quantum yield determined at irradiation wavelength λirr. [e] Measured in H2O/DMSO 99 : 1. [f] Measured in Tris buffer (20 mm, pH=7.5)/MeCN 1 : 1.