عنوان
Synthesis of novel mixed- ligand palladium (II) based on graphene and oxime: its application as a recyclable catalyst
نویسنده (گان)
عشيري,سميرا;Mehdipour,Ebrahim
چکیده مقاله
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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