Siliceous, variable-temperature diffuse

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

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]

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]

K.G. Proctor and D.E. Leyden, Surface Acidity Characterization of Siliceous Materials by Variable Temperature Diffuse Reflectance FTIR, Chemically Modified Oxide Surfaces, Vol. 3, D.E. Leyden and W.T. Collins Eds., Gordon and Breach Science Publishers, New York, pp. 137-149, 1990. [Pg.396]

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]