Variable-temperature diffuse reflectance Fourier transform infrared

Variable-Temperature Diffuse Reflectance Fourier Transform Infrared Spectroscopic Studies of Amine Desorption from a Siliceous Surface... [Pg.254]

Variable-temperature diffuse reflectance Fourier transform infrared spectroscopy provided qualitative and quantitative information concerning the acidity of surface sites on silica. Although the use of pyridine as a probe has been well known for many years, the ability of the technique to permit... [Pg.262]

See Silicon-aluminum interactions in biology Alzheimer s disease, role of aluminum, 606 Amine desorption, variable-temperature diffuse reflectance Fourier transform infrared (FTIR) spectroscopy from siliceous surface, 257-266 Amine-stabilized sol, manufacturing... [Pg.651]

D.E. Leyden and K.G. Proctor, Variable-Temperature Diffuse Reflectance Fourier Transform Infrared Spectroscopic Studies of Amine Desorption from a Siliceous Surface, The Colloid Chemistry of Silica, ACS Advances in Chemistry Series No. 234, H. Bergna Ed., pp. 257-267, 1994. [Pg.396]

Variable-temperature diffuse reflectance infrared Fourier transform spectroscopy was used in conjunction with pyridine desorption studies to assess the acidity of a siliceous surface. An amorphous, porous silica substrate was investigated. The results contribute to an understanding of the acidic strength and the distribution of acidic sites on this material. A hydrogen-bonding interaction was observed between pyridine and the surface. Isothermal rate constants and an activation energy for the desorption process are reported and can be used as direct measures of surface site acidity. [Pg.254]