EY-catalyzed PET-RAFT polymerization of OEOMA500 with varying degrees of polymerizationa.
| No. | [OEOMA500]/[CPADB]/[EYH2]/[TEOA] | [CPADB] (mM) | Conv.b (%) | M n,th | M n,abs c | M n,app d | Đ d |
|---|---|---|---|---|---|---|---|
| 1 | 50/1/0.0025/0.15 | 6.0 | 0 | — | — | — | — |
| 2 | 100/1/0.005/0.3 | 3.0 | 53 | 28 000 | 32 000 | 29 500 | 1.14 |
| 3 | 200/1/0.01/0.6 | 1.5 | 75 | 75 000 | 82 500 | 64 000 | 1.42 |
| 4 | 400/1/0.02/1.2 | 0.75 | 58 | 116 000 | 98 500 | 74 000 | 1.68 |
| 5 | 600/1/0.03/1.8 | 0.5 | 50 | 150 000 | 108 000 | 80 000 | 2.52 |
| 6 | 800/1/0.04/2.4 | 0.325 | 51 | 204 000 | 98 500 | 74 000 | 3.63 |
| 7 | 1000/1/0.05/3.0 | 0.3 | 50 | 250 000 | 115 000 | 84 000 | 4.01 |
a
Reaction conditions [OEOMA500] = 300 mM, [CPADB] = 6.0–0.3 mM, [EYH2] = 15 μM, [TEOA] = 0.9 mM in PBS with DMSO (10% v/v), irradiated for 30 min under green LEDs (520 nm, 9.0 mW cm−2) in an open vial with stirring at 500 rpm.
b
Monomer conversion was determined by using 1H NMR spectroscopy.
c
Molecular weight (Mn,abs) was determined by Mark–Houwink calibration (see ESI).
d
Apparent molecular weight (Mn,app) and dispersity (Đ) were determined by GPC analysis (DMF as eluent) calibrated to poly(methyl methacrylate) standard.