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Solid-state 1D 15N{1H} DNP–CP–MAS spectra of 100%-amine–coCOF–H without CO2 exposure. The spectrum was acquired at 9.4 T, 8 kHz MAS, 95 K, in the presence of 16 mM AMUPol biradical in 60:30:10 d8-glycerol/D2O/H2O, under microwave irradiation at 263 GHz, and using cross-polarization contact times of 5 ms. Blue markings correspond to values obtained by quantum-chemical calculations (See Tables S4, S5, and S7).
