Accession Number : ADA181120
Title : Emission Spectroscopic Evidence of Bronsted Acid Sites in a Calcinated Vycor Glass.
Descriptive Note : Technical rept.,
Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY AND BIOCHEMISTRY
Personal Author(s) : Lin,C T ; Hsu,W L ; Yang,C L ; El-Sayed,M A
PDF Url : ADA181120
Report Date : 18 May 1987
Pagination or Media Count : 23
Abstract : The emission and excitation spectra of quinoline and 2,3-dichloroquinozaline embedded in a calcinated (600 C) porous Vycor glass and dissolved in fluid solutions were recorded at various temperatures. The spectral characteristics and phosphorescence lifetimes of adsorbates were observed to be identical to those in 0.5 N sulphonic acid solutions, indicating that H+ transferred from the surface to the N-heterocyclics. The strong surface-adsorbate interaction is further revealed by the dynamic study of adsorbates at 77 and 4.2K.
Descriptors : *ACIDS, *QUINOLINES, ADSORBATES, DYNAMICS, EMISSION SPECTROSCOPY, EXCITATION, FLUIDS, LIFE SPAN(BIOLOGY), PHOSPHORESCENCE, SPECTRA
Subject Categories : Organic Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE