Chemical researches for micro amounts of metals toward heavy element chemistry

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01951
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 34010:Inorganic/coordination chemistry-related
• Research Institution: Osaka University
• Principal Investigator: Kasamatsu Yoshitaka 大阪大学, 大学院理学研究科, 教授 (70435593)
• Co-Investigator(Kenkyū-buntansha): 北河 康隆 大阪大学, 大学院基礎工学研究科, 教授 (60362612)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 重元素 / 化学 / 微量分析

Outline of Final Research Achievements

For the purpose of establishing chemical research method for heavy elements, chemical experiments and calculations have been performed with various samples including micro amounts of metals which are homologues of heavy elements. In addition, calculation tools were prepared and suitable conditions were determined for quantum chemical calculations for heavy elements taking into account the relativistic effects.
Various chemical experiments with group 2 and 4 elements were performed for No and Rf chemistry. Chemical properties were investigated from the results obtained and calculations, and chemical species were also investigated by chemical analyses such as mass and XAFS spectroscopy. New chemical experiments of various chemical reactions have been achieved for No and new knowledge has been obtained.

Free Research Field

核・放射化学

Academic Significance and Societal Importance of the Research Achievements

全ての元素の系統的理解には重元素の理解が必要である。ただし、短寿命の重元素の今すぐの社会的利用は難しい。しかし、重い元素の理解が進むことによる社会への還元は小さくない。例えば、第5、6周期元素（Ru, Pd, Ir, Ptなど）の有機錯体や合金、触媒の利用が増えており、新しい物性を持つ物質の普及が社会を大きく変えている。ウランなどの工業利用も実は多い。そのような“少し”重い元素においても相対論効果自体の影響は無視できない。元素の完全な理解に不可欠な相対論効果の理解が進めば、すぐに相対論効果の小さい少し重い元素のより完全な理解、そして物質社会への貢献にもつながっていく。