کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
63321 47680 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In situ FTIR study of the adsorption and reaction of 2′-hydroxyacetophenone and benzaldehyde on MgO
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
In situ FTIR study of the adsorption and reaction of 2′-hydroxyacetophenone and benzaldehyde on MgO
چکیده انگلیسی

The adsorption and reaction of 2′-hydroxyacetophenone and benzaldehyde on MgO were investigated via in situ FTIR spectroscopy in an attempt to gain a better understanding of the Claisen–Schmidt condensation reaction between these two molecules catalyzed by MgO. The results indicate that 2′-hydroxyacetophenone adsorbs on MgO through abstraction of the phenolic hydrogen, forming a surface phenolate ion. Benzaldehyde adsorbs through its carbonyl bond and can be subsequently oxidized to form two different types of benzoate species. These benzoate species are inactive toward further reaction with 2′-hydroxyacetophenone and/or its surface derivatives and accumulate on the MgO surface with time on stream. In contrast, the 2′-hydroxyacetophenone-derived phenolate ion reacts with benzaldehyde, yielding an adsorbed chalcone-type product.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 238, Issue 1, 15 February 2006, Pages 165–176
نویسندگان
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