Table 2. DNP Results Obtained with 8 M [2-¹³C]DHAc Samples Polarized Using a HyperSense Polarizer with Liquid-State Polarizations Measured 16 s after Dissolution at 7 T.

[2-13C] DHAc doped with	build-up time constant (s)	liquid-state 13C polarization (%)
(1) PhGA	1033 ± 82	3.1 ± 0.8
(2) PhGA and Gd3+	1023 ± 97	5.1 ± 1.2
(3) d5-PhGA and Gd3+	862 ± 81	4.7 ± 1.0
(4) Trityl and Gd3+	1611 ± 353	16.0 ± 4.0