Shape transformation and optical response of gold clusters using ligand clip method

• Project/Area Number: 16H05961
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Nanostructural chemistry
• Research Institution: Hokkaido University
• Principal Investigator: Shichibu Yukatsu 北海道大学, 地球環境科学研究院, 准教授 (10446255)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥20,150,000 (Direct Cost: ¥15,500,000、Indirect Cost: ¥4,650,000); Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2017: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000); Fiscal Year 2016: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
• Keywords: 幾何構造 / 電子構造 / 形状転換 / 光応答 / 配位子環境 / クラスター / クラスタ―

Outline of Final Research Achievements

In this work, changes in geometric and electronic structures of ligand-protected gold clusters were investigated. Chain lengths of linker moieties of bidentate ligands affected structural adaptability of ligand environments, leading to differences in photoluminescence property. In addition, unique non-bonding interactions between gold cores and ligands of gold clusters were found.

Academic Significance and Societal Importance of the Research Achievements

有機配位子保護金クラスターは、コアの構造や核数などの僅かな違いが物性に大きな影響を及ぼす可能性があり、機能性ナノ材料の素材として多大な注目を集めている。一方、近年の研究報告の大半は幾何構造決定に終始してきた。こうした中で、金コア周りの配位子環境に焦点を当てた本研究から得られた知見は非常に有用であり、有機配位子保護金属クラスターの配位子環境へのアプローチを行うことから金属クラスター研究の今後の進展が期待される。

Research Products

• [Journal Article] Photoluminescence Properties of [Core+exo]-Type Au6 Clusters: Insights into the Effect of Ligand Environments on the Excitation Dynamics (2019)
  • Author(s): Y. Shichibu, M. Zhang, T. Iwasa, Y. Ono, T. Taketsugu, S. Omagari, T. Nakanishi, Y. Hasegawa, K. Konishi
  • Journal Title: The Journal of Physical Chemistry C Volume: 123 Issue: 11 Pages: 6934-6939
  • DOI: 10.1021/acs.jpcc.9b01810
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Unusual Attractive Au-π Interactions in Small Diacetylene-Modified Gold Clusters (2019)
  • Author(s): Iwasaki Mitsuhiro、Shichibu Yukatsu、Konishi Katsuaki
  • Journal Title: Angewandte Chemie International Edition Volume: 58 Issue: 8 Pages: 2443-2447
  • DOI: 10.1002/anie.201814359
  • Peer Reviewed
• [Journal Article] Phosphine-Ligated Gold Clusters with Core+exo Geometries: Unique Properties and Interactions at the Ligand?Cluster Interface (2018)
  • Author(s): Konishi Katsuaki、Iwasaki Mitsuhiro、Shichibu Yukatsu
  • Journal Title: Accounts of Chemical Research Volume: 51 Issue: 12 Pages: 3125-3133
  • DOI: 10.1021/acs.accounts.8b00477
  • Peer Reviewed
• [Journal Article] Hydrogen bonds to Au atoms in coordinated gold clusters (2017)
  • Author(s): Bakar Md. Abu、Sugiuchi Mizuho、Iwasaki Mitsuhiro、Shichibu Yukatsu、Konishi Katsuaki
  • Journal Title: Nature Communications Volume: 8 Issue: 1 Pages: 576-576
  • DOI: 10.1038/s41467-017-00720-3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 二座ホスフィン配位金クラスターの発光特性における配位子環境の影響 (2019)
  • Author(s): 七分勇勝、岩佐豪、武次徹也、小西 克明
  • Organizer: 第13回 分子科学討論会
• [Presentation] Prolate-shaped Gold Cluster Series with Unique Optical Properties: Au6 as a New Building Unit (2018)
  • Author(s): Yukatsu Shichibu, Katsuaki Konishi
  • Organizer: APS March Meeting 2018
  • Int'l Joint Research
• [Presentation] 核数・形状制御された金属サブナノクラスターの光化学特性と電子構造解析 (2017)
  • Author(s): 七分勇勝
  • Organizer: 日本化学会 第96春季年会
  • Place of Presentation: 慶應義塾大学日吉キャンパス（横浜市）
  • Year and Date: 2017-03-16
  • Invited
• [Presentation] Synthesis and structural study of metal cluster compounds (2017)
  • Author(s): 七分勇勝
  • Organizer: 日本化学会 第96春季年会
  • Place of Presentation: 慶應義塾大学日吉キャンパス（横浜市）
  • Year and Date: 2017-03-16
  • Invited
• [Presentation] Prolate-Shaped Gold Clusters with Unique Absorptions: Experimental and Theoretical Study (2017)
  • Author(s): Yukatsu Shichibu, Katsuaki Konishi
  • Organizer: 6th ACCC 2017
  • Int'l Joint Research