oxidation of hydroquinone to benzoquinone using potassium bromate

Under the optimal conditions only main product p-benzoquinone (yield 98%) was obtained after 80 min. G. E. Efremov, E. A. Bovyrina, A. V. Podtyagina, I. V. Oshanina, O. N. Temkin. Photoproducts characterization and formation of light induced secondary OH precursors (LIS-OH). http://pubs.acs.org/page/copyright/permissions.html. Predicting Reactive Intermediate Quantum Yields from Dissolved Organic Matter Photolysis Using Optical Properties and Antioxidant Capacity. The enhancement of the hydrolysis of bamboo biomass in ionic liquid with chitosan-based solid acid catalysts immobilized with metal ions. Miseon Kang, Eunseon Chung, Sang-Ho Kim, Seog Woo Rhee. the Altmetric Attention Score and how the score is calculated. Working off-campus? The glutathione conjugates of tert-butyl hydroquinone, a metabolite of butylated hydroxyanisole (BHA), possess redox potentials which are much higher as compared to the non-conjugated hydroquinone (0.36 V for the hydroquinone and 1.2–1.4 V for the conjugates).As a result, the redox cycling activity of the conjugates, as measured by oxygen consumption in the presence of a … Fe(III)-EDTA mediated autoxidation of 2,6-Di-t-butylphenol and substituted hydroquinones by molecular oxygen. Find more information on the Altmetric Attention Score and how the score is calculated. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Prefluorescent Nitroxide Probe for the Highly Sensitive Determination of Peroxyl and Other Radical Oxidants. Application of a cross-linked Pd–chitosan catalyst in liquid-phase-hydrogenation using molecular hydrogen. A fast synthesis of hierarchical yolk–shell copper hydroxysulfates at room temperature with adjustable sizes. Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. and NaCl on the sonochemical degradation of 1,4-benzoquinone and hydroquinone using a 200-kHz sonicator. The following equation represents the oxidation of ortho-methylated phenol. You may be able to access through {InstitutionName}. In the first step, deprotonation leads to a phenoxide ion which is transformed into a phenoxy radical by a one-electron oxidation. Trimethyl Lock: A Multifunctional Molecular Tool for Drug Delivery, Cellular Imaging, and Stimuli-Responsive Materials. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3034–3043, 2006. Copper (sorbed on chitosan flakes) was used as a catalyst for the oxidation of hydroquinone, with dioxygen (from air) and hydrogen peroxide as oxidizing agents. The activity of the catalysts was measured in the model reaction—oxidation of hydroquinone (H 2 Q) to p-benzoquinone (Q) by hydrogen peroxide (H 2 O 2). Yi Zhang, Rossana Del Vecchio, and Neil V. Blough . A Novel Method for Synthesizing p-Benzoquinone by Direct Catalytic Oxidation of Benzene with Hydrogen Peroxide over Copper-Doped TS-1. A Chemical Oscillator Based on the Photoreduction of 2-Methyl-1,4-benzoquinone. In lieu of an abstract, this is the article's first page. Garrett Mckay, Wenxi Huang, Cristina Romera-Castillo, Jenna E. Crouch, Fernando L. Rosario-Ortiz, and Rudolf Jaffé . Hartmut Herrmann, Thomas Schaefer, Andreas Tilgner, Sarah A. Styler, Christian Weller, Monique Teich, and Tobias Otto . Figure S-1:  competition between 3ap and dioxygen for the methyl radical; Figure S-2:  HPLC chromatogram showing coelution of III synthesized from mBQ photolysis, Fenton reaction, and nitrite photolysis; Figure S-3:  relationship between the yield of III determined chromatographically and loss of 3ap determined by EPR on identical samples; and Figure S-4:  dependence of the formation rate of III on DMSO concentration. Users are Learn More. Khan M. G. Mostofa, Cong-qiang Liu, Hiroshi Sakugawa, Davide Vione, Daisuke Minakata, M. Saquib, M. Abdul Mottaleb. Min Jia, Yu Tang, Yiu-Fai Lam, Sarah A. https://doi.org/10.1134/S199079312001011X, https://doi.org/10.1007/s12209-019-00216-9, https://doi.org/10.1134/S0023158419010051, https://doi.org/10.1016/j.procbio.2018.02.012, https://doi.org/10.1016/j.poly.2017.10.026, https://doi.org/10.1016/j.elecom.2017.12.007, https://doi.org/10.5012/bkcs.2014.35.11.3209, https://doi.org/10.1016/j.jorganchem.2014.05.033, https://doi.org/10.1007/s00253-012-3905-7, https://doi.org/10.1016/j.jcis.2011.05.065, https://doi.org/10.1007/s11243-009-9188-x, https://doi.org/10.1016/S0040-4039(00)73327-2, https://doi.org/10.1016/0022-328X(84)87007-2. E-mail:  (N.V.B.) Photoprocesses of Chloro-Substituted p-Benzoquinones. By continuing you agree to the use of cookies. The oxidation reaction of H2Q showed a kinetic behaviour typical for a Michaelis–Menten mechanism. Hydroquinone as a single precursor for concurrent reduction and growth of carbon nanotubes on graphene oxide. Under the optimal conditions only main product p -benzoquinone (yield 98%) was obtained after 80 min. Highly efficient biosynthesis of α-arbutin from hydroquinone by an amylosucrase from Cellulomonas carboniz. Study of the simulated sunlight photolysis mechanism of ketoprofen: the role of superoxide anion radicals, transformation byproducts, and ecotoxicity assessment. Copyright © 2002 Elsevier Science B.V. All rights reserved. system. Aqueous-Phase Secondary Organic Aerosol Formation Via Reactions with Organic Triplet Excited States—a Short Review. Number of times cited according to CrossRef: Recent progresses in the application of cellulose, starch, alginate, gum, pectin, chitin and chitosan based (nano)catalysts in sustainable and selective oxidation reactions: A review. PSII as an in vivo molecular catalyst for the production of energy rich hydroquinones - A new approach in renewable energy. of concentrated sulfuric acid is slowly poured in, and the mixture is again cooled to 20 (Note 1).. Mikael Larsson, Ali Yousefi, Sait Elmas, Johan B. Lindén, Thomas Nann, and Magnus Nydén . As a result, the redox cycling activity of the conjugates, as measured by oxygen consumption in the presence of a reducing agent, is increased tenfold as compared to the non-conjugated hydroquinone. Facet-Selective Adsorption on Noble Metal Crystals Guided by Electrostatic Potential Surfaces of Aromatic Molecules. We use cookies to help provide and enhance our service and tailor content and ads. Your Mendeley pairing has expired. Prasada Rao, Girish C. Joshi. Ethylene and Cyclohexene Oxidation by p-Benzoquinone, Hydrogen Peroxide, and Oxygen in the Solutions of Cationic Pd(II) Complexes in Acetonitrile–Water and Ionic Liquid–Water Binary Solvents. We use cookies to help provide and enhance our service and tailor content and ads. The catalytic activity and selectivity in the Cu(II)–resin system increases compared to reaction without catalyst and with native Cu(II) ions. Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst. Advanced Separations by Specialized Sorbents. Hydroquinone–quinone oxidation by molecular oxygen: a simple tool for signal amplification through auto-generation of hydrogen peroxide E. Sella and D. Shabat, Org.

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