Table 2.
The lower limits of detection (LOD) and the logarithms of the calculated stability constants (logK) of the new macrocycles with the preferred metal ions.
| Preferred Ion | Macrocycle | Peak Wavelength of the Complex 1 [nm] | LOD [M] | logK |
|---|---|---|---|---|
| Zn2+ | 12 | 444 | 7.0 × 10−8 | 5.5 ± 0.1 |
| 15 | 434 | 1.7 × 10−7 | 5.6 ± 0.2 | |
| 17 | 446 | 2.3 × 10−6 | 5.1 ± 0.3 | |
| Al3+ | 12 | 437 | 2.2 × 10−7 | 5.5 ± 0.3 |
| 15 | 412 | 5.9 × 10−8 | 5.6 ± 0.2 | |
| 17 | 419 | 1.9 × 10−6 | 4.9 ± 0.1 | |
| Bi3+ | 12 | 439 | 2.2 × 10−7 | 4.9 ± 0.3 |
| 15 | 483 | 4.6 × 10−6 | 5.0 ± 0.1 | |
| 17 | 438 | 2.0 × 10−7 | 4.8 ± 0.1 |
1 LODs were calculated using the slope of the calibration curve recorded at the peak wavelength of the corresponding complexes according to the standard method detailed in Section 4.2.