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题名: Secondary alcohols oxidation with hydrogen peroxide catalyzed by [n-C16H33N(CH3)(3)](3)PW12O40: Transform-and-retransform process between catalytic precursor and catalytic activity species
作者: Zhang, Shengjun1, 2;  Zhao, Gongda1;  Gao, Shuang1;  Xi, Zuwei1;  Xu, Jie1
关键词: alcohols ;  H2O2 ;  oxidation ;  polyoxonnetalates
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2008-06-17
DOI: 10.1016/j.molcata.2008.04.004
卷: 289, 期:1-2, 页:22-27
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: [n-C16H33 N(CH3)(3)](3) PW12O40 (1a) catalyzed the oxidation of secondary alcohols with 27.5% aqueous hydrogen peroxide under solvent-free conditions. The isolated yields of all ketones were higher than 92%. The turnover number of the catalyst la was above 368, and the highest TON and TOF were up to 3840 and 320 h(-1). In this catalytic system, the catalytic active species was {PO4[WO(O-2)(2)](4)}(3-), which was formed from la in the reaction. It was discovered that {PO4[WO(O-2)(2)](4)}(3-) (PW4) and [PW12O40](3-) (PW12) kept an equilibrium during the alcohol oxidation by simultaneous monitoring. the distribution of species in organic and aqueous phases. The analysis of the W content in the aqueous phase by ICP and the detection of the species transformation in the organic phase by P-31 NMR revealed that the most of the PW4 species were transformed to the PW12 species again after the reaction. PW12 and PW4 were in the transform-and-retransform process. (C) 2008 Elsevier B.V. All rights reserved.
关键词[WOS]: AEROBIC OXIDATION ;  GREEN CHEMISTRY ;  RECYCLABLE CATALYST ;  BIPHASE MEDIUM ;  ATOM ECONOMY ;  IONIC LIQUID ;  EPOXIDATION ;  EFFICIENT ;  POLYOXOMETALATE ;  COMPLEXES
语种: 英语
WOS记录号: WOS:000257897800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141222
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.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Shengjun,Zhao, Gongda,Gao, Shuang,et al. Secondary alcohols oxidation with hydrogen peroxide catalyzed by [n-C16H33N(CH3)(3)](3)PW12O40: Transform-and-retransform process between catalytic precursor and catalytic activity species[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2008,289(1-2):22-27.
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