Table 2.
Anisotropy g-factors (gCD) of L-Thr-CdS QDs prepared by phase transfer ligand exchange from OA-CdS QDs using various polar solvents and ammonium countercations.
|
gCD (× 10−4) /λ (nm) |
|||
|---|---|---|---|
| L-Thr-TMA+ | L-Thr-TBA+ | L-Thr-NH4+ | |
| DIW | no transfer a | no transfer b | no transfer a |
| MeOH | 3.5 (0.03) c / 400.5 | 2.9 (0.03) / 401.0 | 6.8 (0.04) / 387.0 |
| NMF | 1.0 (0.05) / 399.5 | 0.5 (0.08) / 399.0 | 3.1 (0.03) / 387.5 |
| FA | −0.3 (0.09) / 371.0 | −1.1 (0.05) / 373.5 | 1.8 (0.05) / 389.5 |
| DMSO | -- d | −0.2 (0.10) / 402.0 | 2.3 (0.02) / 387.0 |
| DMF | -- d | 0.3 (0.10) / 405.0 | 1.1 (0.04) / 393.5 |
| MeCN | -- d | 0.7 (0.08) /377.0 | no transfer b |
No phase transfer.
Partial ligand exchange without phase transfer; chiral CdS QDs in the cyclohexane layer.
Numbers in parentheses designate standard deviation (n≥3).
QDs crashed out of the solution.