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Copper nanotube composite membrane as a catalyst in Mannich reaction

Arman B. Yeszhanov, Anastassiya A. Mashentseva, Ilya V. Korolkov, Yevgeniy G. Gorin, Artem L. Kozlovskiy, and Maxim V. Zdorovets

The Institute of Nuclear Physics of the Republic of Kazakhstan, Almaty, Kazakhstan

 

Abstract: Nanoporous poly(ethylene terephthalate) track-etched membranes (PET TeMs) prepared by +15Kr84 ions bombardment (1.75 MeV per nucleon with the ion fluency of 4 × 107 cm−2) and sequential etching were used in this study as a template for electrochemical deposition of highly ordered copper nanotube arrays. X-ray diffraction, scanning electron microscopy and energy-dispersive analysis were used for a complex analysis of synthesized composite membranes. “As-prepared” Cu/PET composites were used as a heterogeneous catalyst in one-pot-three-component Mannich reaction of acetophenone, benzaldehyde and aniline. The effect of reaction time on the synthesis of β-amino ketone was studied and the best yield was isolated after 24 h. The reusability of the studied composites was checked at 25 °C 5 times consecutively. We found that PET TeMs with embedded copper nanotubes could be recycled and reused several times: yields were decreased from 78.2% (1st cycle) to the 19.0% (5th cycle).

Keywords: Track-etched membranes ; Electrochemical deposition ; Template synthesis ; Cu nanotubes ; Catalysis ; Mannich reaction 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-018-0539-y

 

Chemical Papers 72 (12) 3189–3194 (2018)

Tuesday, May 21, 2024

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