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学科主题: 物理化学
题名: An Intermetallic Au24Ag20 Superatom Nanocluster Stabilized by Labile Ligands
作者: Wang, Yu1, 2;  Su, Haifeng1, 2;  Xu, Chaofa1, 2;  Li, Gang3, 4;  Gell, Lars5, 6;  Lin, Shuichao1, 2;  Tang, Zichao3;  Hakkinen, Hannu6;  Zheng, Nanfeng1, 2, 5
通讯作者: NanfengZheng
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2015-04-08
DOI: 10.1021/jacs.5b01232
卷: 137, 期:13, 页:4324-4327
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: An intermetallic nanocluster containing 44 metal atoms, Au24Ag20(2-SPy)(4)(PhC C)(20)C-l2, 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 Au-12@Ag-20@Au-12 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 s-bonds, leading to the formation of two types of surface staple units (PhC C-Au-L, L = PhC C- or 2-pyridylthiolate) on the cluster. The co-presence of three different surface ligands allows the site-specific surface and functional modification of the cluster. The lability of PhC C- ligands on the cluster was demonstrated, making it possible to keep the metal core intact while removing partial surface capping. Moreover, it was found that ligand exchange on the cluster occurs easily to offer various derivatives with the same metal core but different surface functionality and thus different solubility.
关键词[WOS]: SCANNING-TUNNELING-MICROSCOPY ;  PROTECTED GOLD NANOPARTICLES ;  CRYSTAL-STRUCTURE ;  SILVER NANOPARTICLES ;  OPTICAL-PROPERTIES ;  AU-25 CLUSTER ;  BINDING MOTIF ;  THIOLATE ;  RESOLUTION ;  SURFACE
语种: 英语
WOS记录号: WOS:000352752000013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143776
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.Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Xiamen 361005, Peoples R China
2.Xiamen Univ, Coll Chem & Chem Engn, Natl Engn Lab Green Chem Prod Alcohols Ethers Est, Xiamen 361005, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
4.Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116012, Peoples R China
5.Univ Jyvaskyla, Nanosci Ctr, Dept Phys, FI-40014 Jyvaskyla, Finland
6.Univ Jyvaskyla, Nanosci Ctr, Dept Chem, FI-40014 Jyvaskyla, Finland

Recommended Citation:
Wang, Yu,Su, Haifeng,Xu, Chaofa,et al. An Intermetallic Au24Ag20 Superatom Nanocluster Stabilized by Labile Ligands[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2015,137(13):4324-4327.
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