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.
CF3SO3H and CF3SO3H/CD3CN adducts in silicalite channels as model systems for H-ZSM-5 Brønsted acidity evaluation
ZECCHINA, Adriano
1999-01-01
Abstract
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.
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