Table 1. Enantioselective adsorption of a racemic DOPA solution on chiral mesoporous platinum films.
| Entry | Sample name | Temperature (°C) | Time (h) | αD/L* |
|---|---|---|---|---|
| 1 | NIM-Pt 4C cm−2† | 22 | 1 | 0.99±0.05 |
| 5 | 0.98±0.05 | |||
| 2 | CIM-Pt-L 4C cm−2‡ | 22 | 1 | 1.02±0.05 |
| 5 | 1.29±0.05 | |||
| 3 | CIM-Pt-L 8C cm−2§ | 22 | 1 | 0.96±0.05 |
| 5 | 1.32±0.05 | |||
| 4 | CIM-Pt-L 8C cm−2§ | 2 | 1 | 1.18±0.05 |
| 3 | 1.52±0.05 | |||
| 5 | CIM-Pt-D 4C cm−2|| | 2 | 1 | 0.98±0.05 |
| 5 | 0.93±0.05 | |||
| 6 | CIM-Pt-D 8C cm−2¶ | 2 | 1 | 0.91±0.05 |
| 3 | 0.85±0.05 |
*The D/L DOPA separation factor (αD/L) was calculated as the quotient of the ratios of D-DOPA to L-DOPA concentrations in the solution, after and before being in contact with the platinum films for a certain time (1, 3 and 5 h).
†Non-imprinted mesoporous platinum, deposition charge density of 4C cm−2.
‡Chiral-imprinted mesoporous platinum obtained using L-DOPA as template, deposition charge density of 4C cm−2.
§Chiral-imprinted mesoporous platinum obtained using L-DOPA as template, deposition charge density of 8C cm−2.
||Chiral-imprinted mesoporous platinum obtained using D-DOPA as template, deposition charge density of 4C cm−2.
¶Chiral-imprinted mesoporous platinum obtained using D-DOPA as template, deposition charge density of 8C cm−2.