Laser-Induced Fluorescence of Base Adsorbed on Surface Sites in Solid Catalysts |
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| Authors: | A Lassoued J Deson C Lalo P Batamack A Gédéon J Fraissard |
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| Institution: | (1) Laboratoire de Chimie des Surfaces, UPMC-CNRS (ESA 7069), 4 place Jussieu, 75252 Paris Cedex 05, France |
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| Abstract: | The interaction of quinoline with the surface of Nafion-H and Nafion-H (13 wt%)/silica gel composites, silica gel itself, HY zeolite, dealuminated or not, and two types of alumina is studied by laser-induced fluorescence. Strong Brønsted acid sites interact with quinoline to form the quinolinum, that ion being revealed by a band peaking at 390 nm. When Lewis acid sites are present, a complex formed between these sites and quinoline is observed. A dimeric species and the diffusion of the adsorbates on the surface of the Nafion-H polymer are discussed. |
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| Keywords: | Solid catalyst surfaces laser-induced luminescence acid sites quinoline |
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