Development of Light Emitting Materials by Coordination Assembly

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K21200
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 34:Inorganic/coordination chemistry, analytical chemistry, and related fields
• Research Institution: Hokkaido University
• Principal Investigator: Hirai Kenji 北海道大学, 電子科学研究所, 准教授 (10754400)
• Project Period (FY): 2020-07-30 – 2023-03-31
• Keywords: 金属有機構造体 / MOF / 金属内包フラーレン / 非線形光学 / 量子ドット

Outline of Final Research Achievements

Self-assembly of metal ions and organic ligands gives well-defined porous structures, so-called metal-organic frameworks (MOFs). MOFs encapsulating quantum dots and endohedral metallofullerenes were found to exhibit unique optical properties. MOF-177 encapsulating Li+@C60 showed second harmonic (SHG) generation because of the symmetry breaking induced by the encapsulation of giant molecules. The SHG intensity was enhanced by about 40% compared to Li+@C60 encapsulation, suggesting that the regular arrangement of Li+@C60 by MOF-177 and host-guest interactions can enhance the efficiency of harmonic generation.

Free Research Field

光化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、大気中で不安定な分子や粒子を多孔性材料の中に導入することで、安定な光学応答を示すことに成功した。特に、多孔性材料の中で分子や粒子が配列することで、光学特性が向上しており、光学応答を示す雌新たな複合材料の設計指針となる成果を提示した。