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説明:

Ligand-protected gold nanoclusters have attracted attention as building blocks for functional materials. In this study, we have demonstrated the programmed assembly of the icosahedral Ir@Au12 nanoclusters into a dimer, a linear trimer, linear oligomers, or a triangular trimer via the reaction between the IrAu12 with predefined binding sites and bi- or tri-dentate isocyanide linkers. The formation of the intended structures was confirmed by high-angle annular dark-field scanning transmission electron microscopy using a newly developed sampling protocol. Statistical analysis of the inter-particle distances provided quantitative structure models consistent with the theoretically predicted structures. The linear oligomers exhibited a new absorption peak at ~480 nm. Theoretical calculations indicated that the electron transfers from the IrAu12 moiety to the linker ligand or another IrAu12 moiety involve the absorption. This study demonstrates that programmed assemblies of Au nanoclusters will provide an opportunity to elucidate how novel collective properties arise through assembly.

権利情報:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2025 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.5c02770.

キーワード: gold nanoclusters, programmed assembly, transmission electron microscopy, photoinduced intercluster electron transfer

刊行年月日: 2025-08-13

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 25 issue. 32 acs.nanolett.5c02770

研究助成金:

• Core Research for Evolutional Science and Technology JPMJCR20B2
• Japan Society for the Promotion of Science JP23H00284
• Japan Society for the Promotion of Science JP23H01917
• Japan Society for the Promotion of Science JP23H04874
• Japan Society for the Promotion of Science JP25KJ0897
• University of Tokyo

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5629

公開URL: https://doi.org/10.1021/acs.nanolett.5c02770

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更新時刻: 2025-08-18 10:45:19 +0900

MDRでの公開時刻: 2026-07-30 08:29:14 +0900