ICCAS OpenIR
Catalytic hydrodehalogenation over supported gold: Electron transfer versus hydride transfer
Wang, Yuanyuan1,2; Zhu, Qian1,2; Wei, Yan1,2; Gong, Yanjun1,2; Chen, Chuncheng1,2; Song, Wenjing1,2; Zhao, Jincai1,2
2018-09-05
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume231Pages:262-268
AbstractSelective hydrodehalogenation of a variety of aromatic halides (e.g., halogen subsitute phenones and hexafluorobenzene) using isopropanol as the hydrogen source was successfully achieved over supported Au nanoparticles. Distinct reaction pathways were established based on kinetic analysis and intermediate identification. Surface hydrides generated by isopropanol oxidation mediate the hydrodehalogenation by nucleophilic attack without the involvement of carbon centered radical. On the other hand, engeretic electrons on Au nanoparticles populated by visible light irradiation trigger the dissciation of carbon halogen bond (C-X) by injection to the substrates' lowest unoccupied molecular orbitals (LUMO). The super-linear dependency on light intensity, shape of the action spectrum and formation of aryl radical revealed that electron transfer dominates the hydrodehalogenation process, which features a significantly lower activation barrier than transfer of surface hydride. The observed activity is correlated to energy levels of the substrate electron accepting states.
KeywordSelective Hydrodehalogenation Photocatalysis Supported Gold Electron Transfer Hydride Transfer
DOI10.1016/j.apcatb.2018.03.032
Indexed BySCI
Language英语
WOS IDWOS:000430762300027
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/43264
Collection中国科学院化学研究所
Corresponding AuthorSong, Wenjing
Affiliation1.Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yuanyuan,Zhu, Qian,Wei, Yan,et al. Catalytic hydrodehalogenation over supported gold: Electron transfer versus hydride transfer[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,231:262-268.
APA Wang, Yuanyuan.,Zhu, Qian.,Wei, Yan.,Gong, Yanjun.,Chen, Chuncheng.,...&Zhao, Jincai.(2018).Catalytic hydrodehalogenation over supported gold: Electron transfer versus hydride transfer.APPLIED CATALYSIS B-ENVIRONMENTAL,231,262-268.
MLA Wang, Yuanyuan,et al."Catalytic hydrodehalogenation over supported gold: Electron transfer versus hydride transfer".APPLIED CATALYSIS B-ENVIRONMENTAL 231(2018):262-268.
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