Figure 6.

Static ¹³C SSNMR spectra of ¹³CO₂-loaded α-Zn₃(HCOO)₆ recorded using direct excitation (red traces) and ¹H → ¹³C CP (black traces) at (a) 293 and (b) 173 K. The ¹H → CP SSNMR spectra were obtained using various CP contact times (0.5–10 ms). The location of the adsorbed ¹³CO₂ resonance deduced from the direct-excitation spectrum is highlighted with a yellow box. The ¹H → ¹³C CP spectra of the activated framework are also provided for reference (blue traces, CP contact time = 0.5 ms). All spectra were acquired at 9.4 T.