In situ polymerization of poly(vinylimidazole) into the pores of hierarchical ZSM-5 zeolite as an acid–base bifunctional catalyst for cascade reaction
Roozbeh Javad Kalbasi - Sanaz Mansouri
Roozbeh Javad Kalbasi - Sanaz Mansouri
Faculty of Chemistry, Kharazmi University, Tehran, Iran - Department of Chemistry, Islamic Azad University, Central Tehran Branch, Iran
زبان مقاله : انگلیسی |
تعداد صفحات مقاله : 1 صفحه |
نوع مقاله : چکیده |
ISC کد مقاله در : ISC4026_524711
چکیده
Poly(vinylimidazole)/hierarchical ZSM-5 has been prepared as a novel and efficient acid–base bifunctional catalyst by a simple method. First, the hierarchical ZSM-5 zeolite was synthesized by an indirect method from KIT-6 as a silica source. By this method, control of the zeolite crystallization was achieved due to the adjustment transformation processing of amorphous mesoporous silica to zeolite crystal. Then, vinylimidazole as a basic part was polymerized by an in situ method into the zeolite’s pores. This acid–base bifunctional heterogeneous catalyst was characterized by FT-IR, TG-DTG, N2 adsorption–desorption, TEM, SEM, NH3- TPD, and XRD. The catalyst has been applied to one-pot C–C bond formation tandem cascade reactions condensation by the simple method at low temperature. Due to the uniform distribution of poly(vinylimidazole) in the micro-meso pores of the hierarchical zeolite reactants, the products easily pass through the catalytic active sites. The co-existence of acidic and basic sites in the structure of the catalyst has a crucial role in the superior activity of this catalyst. Moreover, the catalyst showed excellent recyclability and high activity even after 7 runs with only a 10% reduction in activity being detected.کليدواژه ها
Hierarchical ZSM-5, Acid–base bifunctional catalyst, Poly(vinylimidazole), Deacetalization–Henry reaction, Deacetalization–Aldol condensationنحوه استناد به مقاله
در صورتی که می خواهید در اثر پژوهشی خود به این مقاله ارجاع دهید، به سادگی می توانید از عبارت زیر در بخش منابع و مراجع استفاده نمایید:Javad Kalbasi , Roozbeh , 1398 , In situ polymerization of poly(vinylimidazole) into the pores of hierarchical ZSM-5 zeolite as an acid–base bifunctional catalyst for cascade reaction , دومین کنفرانس ملی کاتالیست انجمن شیمی ایران
انتشار دهنده
محل انتشار : دومین کنفرانس ملی کاتالیست انجمن شیمی ایرانمشخصات برگزارکننده همایش : دانشگاه خوارزمي
تعداد مقالات : 215
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