Table 1.
Photophysical properties of perylene dyes in tetrahydrofuran. Absorption maxima (λ abs), molar absorption coefficients (ϵ), emission maxima (λ em), fluorescence quantum yields (Φ), and fluorescence lifetimes (τ) for the acidic and basic forms.
| Dye | λ abs [nm] | ϵ [m −1 cm−1] | λ em [nm] | Φ | τ [ns] | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| acidic | basic[a] | acidic | basic | acidic | basic[a] | acidic | basic[a] | acidic | basic[a] | |
| 2 a | 589 | 676 | 10 1300 | 55 500 | 597 | 735 | 0.99 | 0.10 | 5.3 | 3.2 |
| 2 b | 590 | 673 | 71 800 | 40 300 | 597 | 736 | 0.99 | 0.10 | 5.3 | 3.1 |
| 2 c | 578 | 662 | 75 900 | 47 300 | 584 | 713 | 0.98 | 0.15 | 5.3 | 4 |
| 3 a | 635 | 736[b]
789[c] |
96 600 | 48 400[b]
80 400[c] |
646 | 776[b]
802[c] |
0.85 | 0.25[b]
0.05[c] |
6.4 | 2.8[b]
3.1[c] |
[a] Basic form was generated by the addition of TOAOH to the solution. [b] Monoanionic form was generated by the addition of TOAOH to the solution and bubbling with CO2. [c] Dianionic form was generated by the addition of TOAOH to the solution.