Table 1. Absorption data of porphyrin-azoheteroarene hybrids 4–8 and their corresponding precursors 1–3 recorded in toluene (the concentration used was 1 × 10−6 M and 1 × 10−5 M for Soret band and Q-bands measurements, respectively).
| Compound | Soret band λ [nm] (log ε) | Q bands λ [nm] (log ε) |
|---|---|---|
| 1 | 424 (5.73) | 518 (4.25), 555 (4.05), 594 (3.67), 651 (3.65) |
| 2 | 430 (5.65) | 523 (4.24), 561 (4.01), 598 (3.75), 658 (3.42) |
| 3 | 432 (5.03) | 524 (3.75), 569 (3.72), 663 (3.11) |
| 4 | 423 (5.78) | 517 (4.38), 554 (4.23), 594 (3.86), 650 (3.84) |
| 5 | 429 (5.39) | 522 (4.05), 560 (3.81), 598 (3.53), 657 (3.14) |
| 6 | 433 (5.01) | 525 (3.79), 568 (3.71), 666 (3.33) |
| 7 | 423 (5.92) | 517 (4.45), 553 (4.26), 594 (3.93), 650 (3.90) |
| 8 | 429 (5.62) | 522 (4.27), 560 (4.04), 598 (3.82), 657 (3.54) |