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Vanadium-based polyoxometalate complex as a new and efficient catalyst for phenol hydroxylation under mild condition

Abstract

An eco-compatible catalytic protocol for H2O2 induced hydroxylation of phenol (PH) to catechol (CT) and hydroquinone (HQ) in aqueous medium, using a polyoxovanadate (POV) complex as catalyst, is described. The synthesis of the POV catalyst, with a new type of three dimensional framework, Na6(H2O)22(V10O28).2H2O (1) has been accomplished by establishing a non-hydrothermal one-step methodology under mild condition. The catalyst has been characterized by elemental analysis, spectral studies, single crystal X-Ray diffraction studies, Brunauer–Emmett–Teller (BET) and TGA analysis. Under optimum condition of reaction, conducted at ambient temperature, the phenol conversion reached up to 55.4% providing a TON of 138. The catalyst could be recovered easily and recycled at least up to three cycles without significant change in activity. The developed methodology is operationally simple and free from halogenated solvent or any other hazardous additive.

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Publication details

The article was received on 15 Nov 2017, accepted on 12 Feb 2018 and first published on 13 Feb 2018


Article type: Paper
DOI: 10.1039/C7NJ04433J
Citation: New J. Chem., 2018, Accepted Manuscript
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    Vanadium-based polyoxometalate complex as a new and efficient catalyst for phenol hydroxylation under mild condition

    N. S. Islam, M. Sharma, G. Saikia, K. Ahmed, S. R. Gogoi and V. G. Puranik, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C7NJ04433J

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