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Deng G, Lee K, Deng H, Malola S, Bootharaju MS, Häkkinen H, Zheng N, Hyeon T. Alkynyl-Protected Chiral Bimetallic Ag 22 Cu 7 Superatom with Multiple Chirality Origins. Angew Chem Int Ed Engl 2023; 62:e202217483. [PMID: 36581588 DOI: 10.1002/anie.202217483] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/27/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022]
Abstract
Understanding the origin of chirality in the nanostructured materials is essential for chiroptical and catalytic applications. Here we report a chiral AgCu superatomic cluster, [Ag22 Cu7 (C≡CR)16 (PPh3 )5 Cl6 ](PPh4 ), Ag22 Cu7 , protected by an achiral alkynyl ligand (HC≡CR: 3,5-bis(trifluoromethyl)phenylacetylene). Its crystal structure comprises a rare interpenetrating biicosahedral Ag17 Cu2 core, which is stabilized by four different types of motifs: one Cu(C≡CR)2 , four -C≡CR, two chlorides and one helical Ag5 Cu4 (C≡CR)10 (PPh3 )5 Cl4 . Structural analysis reveals that Ag22 Cu7 exhibits multiple chirality origins, including the metal core, the metal-ligand interface and the ligand layer. Furthermore, the circular dichroism spectra of R/S-Ag22 Cu7 are obtained by employing appropriate chiral molecules as optical enrichment agents. DFT calculations show that Ag22 Cu7 is an eight-electron superatom, confirm that the cluster is chirally active, and help to analyze the origins of the circular dichroism.
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Affiliation(s)
- Guocheng Deng
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kangjae Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hongwen Deng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and National & Local Joint Engineering Research Center of Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Sami Malola
- Departments of Physics and Chemistry, Nanoscience Center, University of Jyväskylä, 40014, Jyväskylä, Finland
| | - Megalamane S Bootharaju
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hannu Häkkinen
- Departments of Physics and Chemistry, Nanoscience Center, University of Jyväskylä, 40014, Jyväskylä, Finland
| | - Nanfeng Zheng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and National & Local Joint Engineering Research Center of Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
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