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. Author manuscript; available in PMC: 2021 Jul 5.
Published in final edited form as: J Am Chem Soc. 2019 Aug 8;141(33):13171–13186. doi: 10.1021/jacs.9b05567

Figure 6.

Figure 6.

(a) 13C NMR (16.4 T) MAS spectra of 2-ampd–Mg2(dobpdc) dosed with 1025 mbar of dry 13CO2 at 22 °C (bottom), and the same sample under a subsequent flow of humid, natural isotopic abundance CO2 at atmospheric pressure (top). Spectra were obtained by cross-polarization from 1H (contact time = 1 ms). Peaks corresponding to the framework linker are not observed due to the low natural abundance of 13C nuclei in the framework compared to the 99% 13C enrichment level for the chemisorbed CO2. (b) 1H NMR spectra obtained by single-pulse excitation for the same samples as in (a). The MAS rate was 15 kHz in all cases. Asterisks mark spinning sidebands.