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题名: The effect of TEMPO in the hydroxylation of benzene to phenol on the [(CH3)(4)N](4)PMo11VO40/ascorbic acid/TEMPO/O-2 catalytic system: Formation of ascorbic acid radicals through hydrogen exchange of ascorbic acid and TEMPO
作者: Yang, Hua1, 2, 3;  Chen, Jia-Qi1, 2, 3;  Li, Jun1, 2;  Lv, Ying1, 2;  Gao, Shuang1, 2
关键词: TEMPO ;  Ascorbic acid ;  Oxygen ;  Benzene ;  Phenol
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2012-02-16
DOI: 10.1016/j.apcata.2011.11.032
卷: 415, 页:22-28
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Hydroxylation of benzene to phenol in the [(CH3)(4)N](4)PMo11VO40/ascorbic acid/TEMPO/O-2 catalytic system was carefully investigated. UV-vis, ESR and H-1 NMR studies showed ascorbic acid radicals were formed through the hydrogen exchange of ascorbic acid with TEMPO (2,2,6,6-tetramethy1-1-piperidine-N-oxyl radicals) during the reaction. In acetonitrile, the ascorbic acid would be partly oxidized to 2-hydroxy-2-buten-4-olide (alpha-tetronic acid. isotetronic acid, compound 1) without TEMPO. The interaction of TEMPO and ascorbic acid restrained the oxidative dissociation of ascorbic acid and promoted the rate of the hydroxylation. Aqueous acetic acid solvent can also restrain the oxidative dissociation of ascorbic acid. In aqueous acetic acid, the yield of phenol could reach 18.9% in the [(CH3)(4)N](4)PMo11VO40/ascorbic acid/TEMPO/O-2 catalytic system with sufficient ascorbic acid after 400 min. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: COMPOSITE MEMBRANE REACTOR ;  MOLECULAR-OXYGEN ;  AEROBIC OXIDATION ;  DIOXYGEN ;  O-2
语种: 英语
WOS记录号: WOS:000301020800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138083
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Yang, Hua,Chen, Jia-Qi,Li, Jun,et al. The effect of TEMPO in the hydroxylation of benzene to phenol on the [(CH3)(4)N](4)PMo11VO40/ascorbic acid/TEMPO/O-2 catalytic system: Formation of ascorbic acid radicals through hydrogen exchange of ascorbic acid and TEMPO[J]. APPLIED CATALYSIS A-GENERAL,2012,415:22-28.
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