Chemistry Letters, Vol.30, No.11, 1164-1165, 2001
H-1 NMR study of hydroxy groups in mesoporous molecular sieve SBA-15
Three types of hydroxy groups, which are attributed to single, hydrogen-bonded and geminal SiOHs in mesoporous molecular sieve SBA-15 are directly and quantitatively observed by H-1 ultrafast MAS NMR spectroscopy.