NDLI: Phase-transfer hydroxylation of benzene with H<sub>2</sub>O<sub>2</sub> catalyzed by a nitrile-functionalized pyridinium phosphovanadomolybdate

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Catalysis Science & Technology Vol - 3 Issue - 4

Catalysis Science & Technology Vol - 3 Issue - 3

Catalysis Science & Technology Vol - 3 Issue - 2

Catalysis Science & Technology Vol -2

Catalysis Science & Technology Vol -1

Phase-transfer hydroxylation of benzene with H₂O₂ catalyzed by a nitrile-functionalized pyridinium phosphovanadomolybdate

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhou, Yu Wang, Jun Chen, Guojian Huang, Jun Zhao, Pingping
Copyright Year	2013
Abstract	A new nitrile-tethered pyridinium polyoxometalate (POM) was prepared by anion-exchange of the ionic liquid precursor [N-butyronitrile pyridine]Cl ([C3CNpy]Cl) with the Keggin phosphovanadomolybdic acid H5PMo10V2O40 (PMoV2), and the obtained organic POM salt [C3CNpy]4HPMoV2 was characterized by XRD, SEM, TG, 1H NMR, 13C NMR, ESI-MS, CHN elemental analysis, nitrogen sorption experiment, and melting point measure. When used as a catalyst, [C3CNpy]4HPMoV2 causes the first example of reaction-controlled phase-transfer hydroxylation of benzene with H2O2, showing high activity and stable reusability. Based on spectral characterizations and comparisons of reaction results, plus the reversible color change between fresh and recovered catalyst, a unique reaction mechanism is proposed for understanding the highly efficient [C3CNpy]4HPMoV2-catalyzed phase-transfer catalysis. The formation of dissolvable active species [VO(O2)]+ is responsible for the phase-transfer behavior, while the intramolecular charge transfer and the protonated nitrile in cations accelerate the reaction and favor a better catalyst recovery rate.
Starting Page	1394
Ending Page	1404
Page Count	11
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	3
Issue Number	5
Journal	Catalysis Science & Technology
DOI	10.1039/c3cy20796j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Acid Oxygen Hydrogen peroxide Nitrile Hydroxylation Pyridinium Polyoxometalate Nitrogen Ionic liquid X-ray crystallography Sorption Pyridine China Benzene Reaction mechanism Phase-transfer catalyst Nuclear magnetic resonance
Content Type	Text
Resource Type	Article
Subject	Catalysis

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Phase-transfer hydroxylation of benzene with H₂O₂ catalyzed by a nitrile-functionalized pyridinium phosphovanadomolybdate

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