0000000001309811

AUTHOR

Chaofa Xu

showing 10 related works from this author

Embryonic Growth of Face-Center-Cubic Silver Nanoclusters Shaped in Nearly Perfect Half-Cubes and Cubes.

2016

Demonstrated herein are the preparation and crystallographic characterization of the family of fcc silver nanoclusters from Nichol’s cube to Rubik’s cube and beyond via ligand-control (thiolates and phosphines in this case). The basic building block is our previously reported fcc cluster [Ag14(SPhF2)12(PPh3)8] (1). The metal frameworks of [Ag38(SPhF2)26(PR′3)8] (22) and [Ag63(SPhF2)36(PR′3)8]+ (23), where HSPhF2 = 3,4-difluorothiophenol and R′ = alkyl/aryl, are composed of 2 × 2 = 4 and 2 × 2 × 2 = 8 metal cubes of 1, respectively. All serial clusters share similar surface structural features. The thiolate ligands cap the six faces and the 12 edges of the cube (or half cube) while the phosp…

02 engineering and technologyCrystal structureCubic crystal system010402 general chemistry01 natural sciencesBiochemistryCatalysissilver nanoclustersNanoclustersMetalchemistry.chemical_compoundColloid and Surface ChemistryCluster (physics)ta116Alkylembryonic growthchemistry.chemical_classificationta114ChemistryGeneral Chemistry021001 nanoscience & nanotechnology0104 chemical sciences3. Good healthCrystallographyvisual_artvisual_art.visual_art_mediumCube0210 nano-technologyPhosphineJournal of the American Chemical Society
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An Intermetallic Au24Ag20 Superatom Nanocluster Stabilized by Labile Ligands

2015

An intermetallic nanocluster containing 44 metal atoms, Au24Ag20(2-SPy)4(PhC≡C)20Cl2, was successfully synthesized and structurally characterized by single-crystal analysis and density funtional theory computations. The 44 metal atoms in the cluster are arranged as a concentric three-shell Au12@Ag20@Au12 Keplerate structure having a high symmetry. For the first time, the co-presence of three different types of anionic ligands (i.e., phenylalkynyl, 2-pyridylthiolate, and chloride) was revealed on the surface of metal nanoclusters. Similar to thiolates, alkynyls bind linearly to surface Au atoms using their σ-bonds, leading to the formation of two types of surface staple units (PhC≡C-Au-L, L …

Models MolecularSilversynthesisInorganic chemistryIntermetallicMolecular ConformationCrystal structureLigandsBiochemistryCatalysisSilver nanoparticleNanoclustersMetalColloid and Surface ChemistryCluster (physics)ta116intermetallic nanoclustersta114LabilityChemistrySuperatomGeneral ChemistryNanostructuresCrystallographysurface ligandsvisual_artvisual_art.visual_art_mediumGoldJournal of the American Chemical Society
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Plasmonic twinned silver nanoparticles with molecular precision

2016

Determining the structures of nanoparticles at atomic resolution is vital to understand their structure–property correlations. Large metal nanoparticles with core diameter beyond 2 nm have, to date, eluded characterization by single-crystal X-ray analysis. Here we report the chemical syntheses and structures of two giant thiolated Ag nanoparticles containing 136 and 374 Ag atoms (that is, up to 3 nm core diameter). As the largest thiolated metal nanoparticles crystallographically determined so far, these Ag nanoparticles enter the truly metallic regime with the emergence of surface plasmon resonance. As miniatures of fivefold twinned nanostructures, these structures demonstrate a subtle dis…

NanostructureMaterials scienceScienceGeneral Physics and AstronomyNanoparticlePhysics::OpticsNanotechnology02 engineering and technologyCrystal structure010402 general chemistry01 natural sciencesGeneral Biochemistry Genetics and Molecular BiologySilver nanoparticleArticleSurface plasmon resonanceta116PlasmonMultidisciplinaryta114QGeneral Chemistry021001 nanoscience & nanotechnology0104 chemical sciencesCharacterization (materials science)nanoparticlesnanohiukkaset0210 nano-technologySingle crystal
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CCDC 1530605: Experimental Crystal Structure Determination

2017

Related Article: Huayan Yang, Juanzhu Yan, Yu Wang, Haifeng Su, Lars Gell, Xiaojing Zhao, Chaofa Xu, Boon K. Teo, Hannu Häkkinen , and Nanfeng Zheng|2017|J.Am.Chem.Soc.|139|31|doi:10.1021/jacs.6b10053

Space GroupCrystallographyCrystal Systemhexatriacontakis(mu-34-difluorobenzene-1-thiolato)-octakis(tri-n-butylphosphine)-trihexaconta-silver tetraphenylborateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1496141: Experimental Crystal Structure Determination

2016

Related Article: Huayan Yang, Yu Wang, Xi Chen, Xiaojing Zhao, Lin Gu, Huaqi Huang, Juanzhu Yan, Chaofa Xu, Gang Li, Junchao Wu, Alison J. Edwards, Birger Dittrich, Zichao Tang, Dongdong Wang, Lauri Lehtovaara, Hannu Häkkinen, Nanfeng Zheng|2016|Nat.Commun.|7|12809|doi:10.1038/ncomms12809

Space GroupCrystallographybis(mu-bromo)-bis(mu-chloro)-tridecahectakis(mu-4-t-butylbenzene-1-thiolato)-tetraheptacontatricta-silverCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1530607: Experimental Crystal Structure Determination

2017

Related Article: Huayan Yang, Juanzhu Yan, Yu Wang, Haifeng Su, Lars Gell, Xiaojing Zhao, Chaofa Xu, Boon K. Teo, Hannu Häkkinen , and Nanfeng Zheng|2017|J.Am.Chem.Soc.|139|31|doi:10.1021/jacs.6b10053

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametershexacosakis(mu-34-difluorophenylthiolato)-octakis(tri-n-butylphosphine)-octatriaconta-silver dichloromethane solvateExperimental 3D Coordinates
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CCDC 1530606: Experimental Crystal Structure Determination

2017

Related Article: Huayan Yang, Juanzhu Yan, Yu Wang, Haifeng Su, Lars Gell, Xiaojing Zhao, Chaofa Xu, Boon K. Teo, Hannu Häkkinen , and Nanfeng Zheng|2017|J.Am.Chem.Soc.|139|31|doi:10.1021/jacs.6b10053

hexacosakis(mu-34-difluorobenzene-1-thiolato)-octakis(triphenylphosphine)-octatriaconta-silver dichloromethane solvateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1530604: Experimental Crystal Structure Determination

2017

Related Article: Huayan Yang, Juanzhu Yan, Yu Wang, Haifeng Su, Lars Gell, Xiaojing Zhao, Chaofa Xu, Boon K. Teo, Hannu Häkkinen , and Nanfeng Zheng|2017|J.Am.Chem.Soc.|139|31|doi:10.1021/jacs.6b10053

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametershexatriacontakis(mu-34-difluorobenzene-1-thiolato)-octakis(tri-n-butylphosphine)-trihexaconta-silver bromideExperimental 3D Coordinates
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CCDC 1427733: Experimental Crystal Structure Determination

2015

Related Article: Yu Wang, Haifeng Su, Chaofa Xu, Gang Li, Lars Gell, Shuichao Lin, Zichao Tang, Hannu Häkkinen, and Nanfeng Zheng|2015|J.Am.Chem.Soc.|137|4324|doi:10.1021/jacs.5b01232

Space GroupCrystallographyCrystal Systembis(mu-chloro)-icosakis(mu-phenylethynyl)-tetrakis(mu-pyridine-2-thiolato)-tetracosa-gold-icosa-silver tetrahydrateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1496142: Experimental Crystal Structure Determination

2016

Related Article: Huayan Yang, Yu Wang, Xi Chen, Xiaojing Zhao, Lin Gu, Huaqi Huang, Juanzhu Yan, Chaofa Xu, Gang Li, Junchao Wu, Alison J. Edwards, Birger Dittrich, Zichao Tang, Dongdong Wang, Lauri Lehtovaara, Hannu Häkkinen, Nanfeng Zheng|2016|Nat.Commun.|7|12809|doi:10.1038/ncomms12809

Space GroupCrystallographyCrystal SystemCrystal StructureTetraphenylphosphonium (mu-chloro)-tetrahexacontakis(mu-4-t-butylbenzene-1-thiolato)-heptatriacontahecta-silver dichlorideCell ParametersExperimental 3D Coordinates
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