Table 1.
Metal dissociation constants for HQuin1, AQuin1 and free 8-hydroxyquinoline (Quin).
| Metal | HQuin1a (M) | AQuin1b (M) | Free Quinc (M) |
|---|---|---|---|
| Co2+ | 4.0 (2) × 10-9 | 3.0 (1) × 10-7 | 6.48 × 10-7 |
| Ni2+ | 4.0 (2) × 10-10 | 3 (1) × 10-8 | 1.55 × 10-7 |
| Cu2+ | 8.5 (9) × 10-14 | 5.4 (5) × 10-9 | 2.29 × 10-10 |
| Zn2+ | 7.1 (3) × 10-9 | 9 (1) × 10-7 | 8.74 × 10-7 |
a
See Experimental Section for a detailed discussion on binding models. Additional figures and tables can be found in Supporting Information.
b
pH-adjusted dissociation constants reported in reference 9.