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Designing a biomimetic catalyst for phenoxazinone synthase activity using mesoporous Schiff base Copper complex with a novel double-helix morphology

Abstract

Abstract Condensation reaction of 3-aminopropyltrimethoxysilane with o-hydroxyacetophenone and subsequent complexation with Cu(CH3COO)2.H2O afforded Schiff base copper complex with silane moiety. Covalent functionalisation of MCM-41 with Schiff base copper complex yielded heterogenised Copper complex which mimics the “CuN2O2” coordination site that resembles the galactose oxidase enzyme. The synthesized materials were characterized by UV-DRS, Fourier transform infrared spectroscopy (FTIR), Thermo Gravimetric Analysis (TGA), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis(EDAX) studies along with High resolution Transmission electron microscopy(HR-TEM) to confirm successful functionalisation. The low angle X-ray diffraction(LA-XRD) and nitrogen sorption analyses not only revealed the conservation of the textural properties of the support but also the permeability of the copper Schiff base complex into the channel system despite the simultaneous decline in surface area, pore volume and pore size. Electron Paramagnetic Resonance(EPR) studies confirmed that Dimerisation of o-aminophenol in the presence of Copper SchiffBase-MCM-41 with tert-butyl hydroperoxide (TBHP) and aqueous peroxide were carried out for MCM-41 and heterogenised Copper complex under the mild reaction conditions. Keywords: Copper complex; MCM-41; Dimerisation; o-aminophenol.

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Publication details

The article was received on 20 Jul 2018, accepted on 05 Oct 2018 and first published on 06 Oct 2018


Article type: Paper
DOI: 10.1039/C8NJ03638A
Citation: New J. Chem., 2018, Accepted Manuscript
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    Designing a biomimetic catalyst for phenoxazinone synthase activity using mesoporous Schiff base Copper complex with a novel double-helix morphology

    R. Muthusami, M. Moorthy, I. kostova, G. Anbarasu, C. Manickam and R. Rangappan, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ03638A

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