The different line-broadening mechanisms which may control the residual linewidths of 1H MAS NMR spectra of zeolites and hence the accuracy of measurement of the strength of gas-phase Brønsted acidity are discussed quantitatively. The residual linewidth is mainly determined by the distribution width of the strength of acidity in the case of highly siliceous zeolites.
E. Brunner, J. Chem. Soc., Faraday Trans., 1990, 86, 3957 DOI: 10.1039/FT9908603957
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