2021 Fiscal Year Final Research Report
Isotope recognition of hydrogen ions using the inner space of multinuclear metal complexes
| Project/Area Number |
20K21209
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 34:Inorganic/coordination chemistry, analytical chemistry, and related fields
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2020-07-30 – 2022-03-31
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| Keywords | 錯体化学 / 多核金属錯体 / 水素イオン / 分子認識 |
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| Outline of Final Research Achievements |
In host-guest chemistry, protons, which are involved in the functionalization of a substance, are considered to be interesting guests, and their capture in a small space is expected to lead to specific behavior and new functionalities. The aim of this study was to develop research aimed at the creation of new host compounds by utilizing a pentanuclear complex consisting of five metal ions and multinucleating ligands. As a specific research result, a rational synthetic method for heterometallic pentanuclear complexes as host compounds was first established. Furthermore, the electron transfer behavior of the resulting heterometallic pentanuclear complexes was elucidated. Finally, the influence of the protons encapsulated in the heterometallic pentanuclear complexes on their physical properties and functions was also successfully evaluated.
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| Free Research Field |
錯体化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により、異種金属5核錯体内部の小空間にプロトンを内包させることに成功し、また内包されたプロトンが新奇な刺激応答性を示すことが判明した。この内包プロトンが示す挙動は、従来型の酸―塩基理論では解釈できないものであり、空間的に孤立したプロトンの特異性が示された。すなわち、本研究では従来の概念を打ち破る新たな物質群の創出を達成したと言える。更に、内包プロトンの有無により異種金属5核錯体の物性ならびに水素発生反応に対する触媒機能が大きく変化することも見出され、内包プロトンの重要性が示された。以上の通り本研究は、プロトンを対象としたホスト―ゲスト化学に新たな知見をもたらすものである。
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