Table 1.
Optical properties of intermediates and fluorescent probes A and B.
| Solvent | λabs (nm) | λem (nm) | εmax (104 M−1cm−1) | Φf (%) | |
|---|---|---|---|---|---|
| Compound 4 | Buffer (pH7.0) | 687 | 703 | 3.2 × 104 | 1.4 |
| Ethanol | 705 | 718 | 5.5 × 104 | 6.7 | |
| THF | 708 | 725 | 5.6 × 104 | 7.0 | |
| Probe A | Buffer (pH7.0) | 695 | 701 | 3.0 × 104 | 0.6 |
| Ethanol | 707 | 717 | 4.6 × 104 | 6.0 | |
| THF | 710 | 723 | 3.1 × 104 | 6.8 | |
| Compound 9 | Buffer (pH7.0) | 685 | 712 | 3.5 × 104 | 1.6 |
| Ethanol | 705 | 717 | 6.1 × 104 | 5.2 | |
| THF | 706 | 721 | 4.2 × 104 | 7.5 | |
| Probe B | Buffer (pH7.0) | 688 | 709 | 4.1 × 104 | 0.8 |
| Ethanol | 705 | 714 | 6.0 × 104 | 4.1 | |
| THF | 717 | 719 | 5.1 × 104 | 5.0 |