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dc.contributor.authorChrispin O Kowenje, David C Doetschman, Jürgen Schulte, Charles W Kanyi, Jared DeCoste, Szu-Wei Yang, Barry R Jones
dc.date.accessioned2020-08-10T07:36:41Z
dc.date.available2020-08-10T07:36:41Z
dc.date.issued2010
dc.identifier.urihttps://repository.maseno.ac.ke/handle/123456789/1908
dc.description.abstractCopper (II)-exchanged faujasite-X zeolites at various loadings of copper per unit cell of zeolites were prepared and then exposed to ammonia. The copper ammine complexes of the various copper levels per unit cell were characterized and analyzed by a combination of diffuse reflectance, X-ray powder diffraction, FT-infrared spectroscopy, electron paramagnetic resonance and nuclear magnetic resonance spectroscopic methods. At low copper exchange levels (<5 copper atoms per unit cell), the major complex is [Cu(Ozeo)2(NH3)2]2+ and it is strongly bound to the zeolite framework walls at single four ring sites (site III). Above five copper atoms per unit cell, the major complex becomes [Cu(NH3)4]2+ and it is least interacting with the zeolite framework walls. The [Cu(NH3)4]2+ complex which was formed at higher copper levels per unit cell was most favoured by the presence of maximal amount of ammonia.en_US
dc.publisherThe South African Chemical Instituteen_US
dc.subjectCation exchange, catalysis, copper, complexation, copper ammines.en_US
dc.titleEffects of copper exchange levels on complexation of ammonia in Cu (II)-exchanged X zeoliteen_US
dc.typeArticleen_US


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