Research Article
C-Silylated Calix[4]Arene as a New Receptor for Aspartate in Polar Solvents
Table 1
Association constants between various receptors and NZDA 8 and aspartic acid 9.
| Entry | Receptor | Guest | (M−1)4 | Stoich. |
| 1 | 4 | NZDA 8 | 1000 (±4%) | 1 : 1 | 2 | 6 | NZDA 8 | 5000 (±6%) | 1 : 1 | 3 | 7 | NZDA 8 | 6000 (±10%) | 1 : 1 | 4 | 10 | NZDA 8 | 2000 (±6%) | 1 : 1 | 5 | 11 | NZDA 8 | 20000 (±10 %) | 2 : 1 |
| 6 | 4 | Aspartic acid 9 | 700 (±7%) | 1 : 1 | 7 | 6 | Aspartic acid 9 | 3000 (±8%) | 1 : 1 | 8 | 7 | Aspartic acid 9 | 900 (±11%) | 1 : 1 | 9 | 10 | Aspartic acid 9 | 300 (±8%) | 1 : 1 | 10 | 11 | Aspartic acid 9 | 5000 (±4%) | 1 : 1 |
|
|