To aid in the deconvolution of this spectrum, an O MQMAS NMR spectrum was acquired (Figure ). This spectrum shows 3 signals and the extracted NMR parameters were consistent with the calculated diso, CQ and hQ values for COO and M-COO, suggesting the formation of carbamate chains and a C=O in the mixed adsorption structure (Table ). However, when fitting these signals to the (Table ). Overall, the work presented in case study 2 shows that O NMR spectroscopy is a powerful probe to explore CO2 binding mechanisms in metal-organic frameworks.