Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.apcatb.2017.07.050
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dc.titleInfluence of the halide and exposed facets on the visible-light photoactivity of bismuth oxyhalides for selective aerobic oxidation of primary amines
dc.contributor.authorHan, Aijuan
dc.contributor.authorZhang, Hongwei
dc.contributor.authorChuah, Gaik-Khuan
dc.contributor.authorJaenicke, Stephan
dc.date.accessioned2019-06-07T02:04:50Z
dc.date.available2019-06-07T02:04:50Z
dc.date.issued2017-12-15
dc.identifier.citationHan, Aijuan, Zhang, Hongwei, Chuah, Gaik-Khuan, Jaenicke, Stephan (2017-12-15). Influence of the halide and exposed facets on the visible-light photoactivity of bismuth oxyhalides for selective aerobic oxidation of primary amines. APPLIED CATALYSIS B-ENVIRONMENTAL 219 : 269-275. ScholarBank@NUS Repository. https://doi.org/10.1016/j.apcatb.2017.07.050
dc.identifier.issn0926-3373
dc.identifier.issn1873-3883
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/155382
dc.description.abstract© 2017 Elsevier B.V. Bismuth oxyhalides BiOX (X = Cl, Br, I) are seldom applied as photocatalysts in organic synthesis. Herein, we investigated their potential for the aerobic oxidative coupling of benzylamine to N-benzylidenebenzylamine, as imines are important synthetic intermediates of pharmaceuticals and biologically active nitrogen-containing organic compounds. The influence of the halide and the exposed crystal facets on the photoactivity was investigated. BiOBr showed excellent photoactivity, surpassing BiOCl and BiOI, which have poor light absorption and oxidation ability, respectively. Three differently facetted BiOBr photocatalysts were synthesized. The {001}-facetted BiOBr exhibited higher intrinsic activity than the {010}- or {110}-samples due to efficient charge separation. However, surface area plays an important role as reactions usually occur at the catalyst surface. Because of their much larger surface area, the solvothermally-synthesized BiOBr microspheres with {110}-dominant exposed facet showed the highest photooxidative activity, with 100% conversion and 100% selectivity to N-benzylidenebenzylamine after 14 h visible light irradiation at room temperature using oxygen from atmospheric air. This work provides an economical, feasible, sustainable and green process for the synthesis of imines and illustrates the great potential of bismuth oxyhalides as photocatalysts for organic synthesis.
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.sourceElements
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectTechnology
dc.subjectChemistry, Physical
dc.subjectEngineering, Environmental
dc.subjectEngineering, Chemical
dc.subjectChemistry
dc.subjectEngineering
dc.subjectBismuth oxyhalides
dc.subjectPhotocatalyst
dc.subjectSelective oxidation
dc.subjectVisible light
dc.subjectFacet
dc.subjectPHOTOCATALYTIC ACTIVITY
dc.subjectCATALYTIC-OXIDATION
dc.subjectARCHITECTURES
dc.subjectNETWORKS
dc.subjectIMINES
dc.subjectMETAL
dc.typeArticle
dc.date.updated2019-06-04T02:21:07Z
dc.contributor.departmentDept of Chemistry
dc.description.doi10.1016/j.apcatb.2017.07.050
dc.description.sourcetitleAPPLIED CATALYSIS B-ENVIRONMENTAL
dc.description.volume219
dc.description.page269-275
dc.published.statePublished
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