Table 1 Overview of the sequence parameters used for all presented ultra-low-field measurements.
# | Substance | Avgs. | TR[s] | B p time[s] | B p field[mT] | B 1 Freq.[Hz] | Nucleus |
|---|---|---|---|---|---|---|---|
1 | Ethyl-5-fluoronicotinic acid | 5 | 6.5 | 2 | 0.144–10.3 | 5775 | 19F |
2 | 3-Fluoropyridine | 5 | 6.5 | 2 | 0.144–10.3 | 5775 | 19F |
3 | 3,5-Bis(trifluoromethyl)pyridine | 50 | 3.5 | 2 | 0.144–10.3 | 5775 | 19F |
4 | Ethyl-5-fluoronicotinic acid | 5 | 8.5 | 4 | 0.144–10.3 | 6140 | 1H |
5 | 3-Fluoropyridine | 5 | 8.5 | 4 | 0.144–10.3 | 6140 | 1H |
6 | 3,5-Bis(trifluoromethyl)pyridine | 5 | 8.5 | 4 | 0.144–10.3 | 6140 | 1H |
7 | Ethyl-5-fluoronicotinic acid | 10 | 1.6–10.6 | 0–10 | 3.1 | 5775 | 19F |
8 | 3-Fluoropyridine | 10 | 1.6–10.6 | 0–10 | 5.2 | 5775 | 19F |
9 | 3,5-Bis(trifluoromethyl)pyridine | 25 | 1.5–10.5 | 1.5–10.5 | 0.14 | 5775 | 19F |
10 | Ethyl-5-fluoronicotinic acid | 10 | 1.6–10.6 | 0–10 | 6.2 | 6140 | 1H |
11 | 3-Fluoropyridine | 10 | 1.6–10.6 | 0–10 | 7.7 | 6140 | 1H |
12 | 3,5-Bis(trifluoromethyl)pyridine | 10 | 1.6–10.6 | 0–10 | 7.7 | 6140 | 1H |
13 | Ethyl-5-fluoronicotinic acid | 50 | 9.5 | 9.5 | 0.144 | 5775 | 19F |
14 | 3-Fluoropyridine | 50 | 9.5 | 4 | 5.2 | 5775 | 19F |
15 | 3,5-Bis(trifluoromethyl)pyridine | 200 | 5.25 | 5.25 | 0.144 | 5775 | 19F |
16 | Ethyl-5-fluoronicotinic acid | 50 | 9.5 | 4 | 6.2 | 6140 | 1H |
17 | 3-Fluoropyridine | 50 | 9.5 | 4 | 7.7 | 6140 | 1H |
18 | 3,5-Bis(trifluoromethyl)pyridine | 100 | 10.1 | 5 | 7.7 | 6140 | 1H |
