Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology


LAST UPDATE 2020/06/10

  • 研究者氏名
    Researcher Name

    塚本孝政 Takamasa TSUKAMOTO
    助教 Assistant Professor
  • 所属
    Professional Affiliation

    Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology

    Molecular functions
  • 研究キーワード
    Research Keywords

    Organic-inorganic hybrid compounds
    Complex chemistry
    Supramolecular chemistry
    Cluster chemistry
Research Subject
Precise synthesis and functionalization of multimetallic clusters based on experimental and theoretical techniques

研究の背景 Background

数個〜数十個の原子から成るクラスター物質は、わずか1 nm程度の大きさを持つ極小の物質であり、しばしば分子でありながらも原子のような量子的な性質を示す興味深い物質群です。しかし、クラスターの合成には原子レベルの制御技術が必要で、中でも複数の元素を含む多元合金クラスターの合成はこれまで困難でした。また、クラスターの原子数・元素種・組成比の組み合わせはほぼ無限大であり、機能発現を狙った分子設計指針を得ることも容易ではありません。このような背景から、長らくクラスター化学には大きな進展が見られず、その学理は未だ詳細に明らかにされていません。

Cluster substances composed of few dozen of atoms are around 1-nanometer ultrasmall materials and interestingly often exhibit quantum properties. However, the precise synthesis of clusters requiring an atomic-level control technology has been technically difficult, especially for multimetallic ones. Moreover, the theoretical guidelines for molecular design toward functionalization have been undeveloped because of about infinite combinations of parameters such as their atomicity, element, and composition. These experimental and theoretical issues have prevented the improvement of the field of cluster chemistry and made their principles still-unknown.

研究の目標 Outcome


To overcome these issues, by the experimental approach based on complex chemistry and supramolecular chemistry, we have developed ‘atom-hybridization method’ realizing the precise synthesis of multimetallic clusters. Additionally, by the theoretical approach adopting computer chemistry, we have proposed ‘super-periodic table’ predicting the stability and functions of clusters in the same way as atoms in the periodic table and ‘super-degeneracy substance’ exhibiting strange properties beyond spherical symmetry. Utilizing such modern experimental and theoretical methods, we have aimed at discovering new principles of cluster substances and developing their innovative functions.

研究図Research Figure

Fig.1. The concept of the atom-hybridization method synthesizing multimetallic clusters with atomic-level precision by using multinuclear dendrimer complexes.

Fig.2. The multidimensional super-periodic table for tetrahedral clusters with four axes (group, period, species, and family).

Fig.3. The cluster exhibiting super-degenerate orbitals beyond sphere originating from the mathematical sequence of interatomic parameter.

文献 / Publications

化学と工業 73, 390–392 (2020). Nature Commun. 10, 3727 (2019). Nature Commun. 9, 3873 (2018). Nature Commun. 9, 3758 (2018). J. Am. Chem. Soc. 139, 5359–5366 (2017). Chem. Commun. 53, 9805–9808 (2017). Chem. Commun. 53, 3657–3660 (2017). ACS Appl. Mater. Interfaces 8, 7522–7528 (2016).