GO supported Schiff base/palladium complex: a superior catalyst for the hydrogenation of nitroarenes | ||||
| Frontiers in Scientific Research and Technology | ||||
| Article 7, Volume 1, Issue 1, 2020, Page 57-67 PDF (574.53 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/fsrt.2020.31546.1015 | ||||
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| Authors | ||||
Hassan M. A. Hassan  1; Ahmed Tolba2; El-Sayed El-Sharkawyb3
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| 1Suez University, Faculty of Science, Egypt | ||||
| 2Department of Chemistry, Faculty of Science, Arish University, Arish, Egypt | ||||
| 3Department of Chemistry, Faculty of Science, Suez University, Suez, Egypt | ||||
| Abstract | ||||
| Reducing nitroarenes to the appropriate amines is a major chemical reaction in all industrial and environmental perspectives. In this work, a novel palladium (II) Schiff/base complex supported on graphene oxide (GO) was synthesized via a coordination interaction as an efficient heterogeneous catalyst. GO was functionalized with 3-aminopropyltriethoxysilane (3-APTES) by the condensation reaction, and then the imidazolium Schiff base ligand was fabricated from the reaction of 5-(1-methylimidazolium)-vanillyl chloride. The synthesized materials were characterized by various techniques including Raman spectroscopy, FTIR, XRD, elementary analysis, TGA, SEM, and TEM. The as-prepared heterogeneous catalyst was applied in the catalytic reduction of nitrobenzene using NaBH4 in aqueous media. The results exhibited excellent catalytic performance and the reaction kinetics followed a pseudo-first-order with rate constant equals to 0.321 min-1. The catalyst was recovered and recycled with high durability even for four catalytic cycles. GO-supported Pd(II) Schiff / base complex is potentially appealing to heterogeneous catalysts for the hydrogenation process. | ||||
| Keywords | ||||
| Graphene oxide; reduction of nitrobenzene; Schiff base; heterogeneous catalyst | ||||
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