Solid-State NMR Quantification of Brønsted–Lewis Acid Site Cooperativity in Zeolites for Glucose Conversion

P correlation NMR experiments reveal the spatial proximity between Brønsted acid sites and framework Sn-derived Lewis acid sites and show that neighboring Lewis acid sites are associated with enhanced Bro̷nsted acidity. The estimated concentration of BAS-LAS pairs correlates strongly with the apparent initial methyl levulinate formation rate, whereas the total BAS or LAS concentrations alone do not capture the same trend.