Table 2.
Association constants (K) for chemosensors (3b), (3c) and (3d) with metals calcium and lead.
| Compound | Kcalcium (M−1) | Klead (M−1) |
|---|---|---|
| 3b | 3.4 × 103 | 5.3 × 103 |
| 3c | - | 2.2 × 104 |
| 3d | 4.8 × 104 | 8.7 × 104 |
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