Table 1 Experimental parameters and chemical shift for different compounds.
Sample | Method | Number of scans | Delay time /s | Spinningspeed /kHz | SNR | FWHM |
|---|---|---|---|---|---|---|
H2SeO3 | SP | 16 | 45 | 10 | 13 | 101 |
HPHD | 16 | 45 | 10 | 28 | 45 | |
CP | 16 | 30 | 10 | 45 | 51 | |
CP | 16 | 30 | 8 | 28 | 58 | |
PhSeO2H | SP | 1200 | 45 | 10 | 32 | 109 |
HPHD | 1200 | 45 | 10 | 45 | 82 | |
CP | 1200 | 30 | 10 | 35 | 85 | |
CP | 1200 | 20 | 8 | 17 | 79 | |
Polymer 4 (-Se-CH3) | SP | 17408 | 5 | 10 | 4 | ~1500 |
HPHD | 17408 | 5 | 10 | 5 | ~1800 | |
CP | 17408 | 5 | 10 | 13 | ~1600 | |
CP | 17108 | 5 | 13 | 16 | ~1800 | |
Polymer 5 (-SeBr) | CP | 17408 | 5 | 10 | – | – |
Polymer 6 (-SeO3H) | SP | 17408 | 5 | 10 | 11 | 681 |
HPHD | 17408 | 5 | 10 | 11 | 698 | |
CP | 17408 | 5 | 10 | 21 | 751 | |
CP | 17408 | 5 | 13 | 21 | 742 |
