Creation and characterization of electronic structures of organic-modified metal superatoms with well-defined geometric structures

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H00370
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: Tsukuda Tatsuya 東京大学, 大学院理学系研究科(理学部), 教授 (90262104)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 金属クラスター / 金属超原子 / 金属超原子分子 / 電子構造 / 幾何構造

Outline of Final Research Achievements

Gold and silver clusters protected by organic ligands (modified superatoms) are expected to be novel functional units because they exhibit specific properties depending on structural factors such as size, composition, shape, and chemical modifications. In this study, we have developed a selective and large-scale synthesis method for a variety of modified superatoms with precisely controlled structural factors. Furthermore, the geometrical and electronic structures were characterized by single crystal X-ray structural analysis and photoelectron spectroscopy, and correlations with basic physical properties such as fluorescence properties, circular dichroism, and catalytic performance were clarified.

Free Research Field

ナノサイエンス

Academic Significance and Societal Importance of the Research Achievements

本研究は、修飾超原子の特徴的な構造因子に対して、電子構造がどのような影響を受け、どのような分子機構で物性や機能が変調・創出されるか？という核心的な問いに端を発している。本研究の成果は、修飾超原子をナノスケールの人工原子として体系化するための分子科学的な基盤の構築に資するとともに、修飾超原子の機能開拓のための構造因子の制御に対する合理的な指針を提示するものである。