Catalysis Letters, Vol.60, No.3, 139-143, 1999
CF3SO3H and CF3SO3H/CD3CN adducts in silicalite channels as model systems for H-ZSM-5 Bronsted acidity evaluation
The vibrational properties of triflic acid and of triflic acid-acetonitrile adducts adsorbed in silicalite channels are described. The spectroscopic modifications induced on triflic acid by the acid-base interaction are compared with those of the HCl/acetonitrile adducts formed in situ in the silicalite channels, and with those of the H-ZSM-5/acetonitrile and of the H-Nafion/acetonitrile systems. It is concluded that triflic acid in silicalite shows an acidity almost comparable to that of H-ZSM-5 and of H-Nafion.