Table 1.
EPR and DNP properties of 10 mM Gd(III) complexes in 13C3-glycerol/H2O (60/40 vol.-%) at 5 T.
| Complex | ZFS parameters[b] | EPR linewidth | εH – 1[a] | εC – 1[a] | |
|---|---|---|---|---|---|
| D (MHz) | ΔD (MHz) | (MHz) | |||
| Gd-DOTA | 672 | 336 | 30[c] | 7.3 (−7.3) | 44.0 (−38.5) |
| GdCl3[d] | 784/2,184 (1:2.8) | 448/952 | 50[c] | 2.5 (−2.5) | 16.5 (−14.5) |
| Gd-DTPA | 1568 | 728 | 170[c] | 1.5 (−1.2) | 6.0 (−8.5) |
[a]
Measured at ~6W μw power; values given at the field of max. positive enhancement, values in parentheses at field of max. magnitude of negative enhancement.
[b]
From ref90.
[c]
At 5 T, simulated from given ZFS parameters.
[d]
Two components contributing to the spectrum with relative weight given in parentheses.