Synthesis of novel mixed- ligand palladium (II) based on graphene and oxime: its application as a recyclable catalyst

سال انتشار: 1397
محل انتشار: بیستمین کنگره شیمی ایران
کد COI اختصاصی: IRANCC20_085
زبان مقاله: انگلیسی
تعداد مشاهده: 326

نویسندگان

Department of Chemistry, organic chemistry, Faculty of Science, Lorestan University, Khoramabad, Iran

چکیده

One of the important fields of organic chemistry is the catalyst design to improve the condition of organic reactions. Palladium (Pd) noble metal is a stable catalyst, which due to its outstanding versatility and high activity, it plays an indispensable role in organic synthesis. Functionalization of the solid supports with show chelating ligands is appearing as a viable method to adjust their catalytic efficiencies and to stabilize the metal complexes [1]. Lately, the applications of graphene oxide (GO) and graphene (rGO) have been widely investigated, by the development of metal-free carbon catalysts and the progress in graphene materials [2]. Functional groups on the GO sheets, according to availability, allow them to react to a wide range of compounds. This property of GO has highlighted it for potential applications in solid support catalysis [3]. In this paper, the palladium (II) mixed-ligand complex synthesized with reduced graphene oxides-containing tetraethoxysilane and menthone oxime and used as an efficient solid catalyst for the Heck-coupling reaction. To maintain stability and catalytic activity in the C-C bond reaction, graphene due to the available surface, as the solid support was considered. The newly synthesized nanocatalyst have beneficial properties including products easy separation, the shorter time to react, purity products (yield 79- 99 %), notably, the catalyst was reused six times without significant degradation in catalytic activity and performance.

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