Abstract
The concentration of Bronsted acid sites on aluminum oxide surfaces has been measured using a deuterated pyridine, wide line nuclear magnetic resonance technique. The wide line nmr spectrum of a transition alumina consists of a narrow line, due to physically adsorbed water, superimposed on a broad line, due to water chemically bound to the lattice. The physically adsorbed water and therefore the narrow line in the nmr spectrum can be removed by mild heating under vacuum. If deuterated pyridine is then added to the surface, it will react with Bronsted acid sites according to the following: ▪ Under proper experimental conditions the proton associated with the pyridinium ion appears as the only narrow line in the nmr spectrum and can be quantitatively measured.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
