2020 Fiscal Year Final Research Report

Control of 3D integration structure of flexible chiral transition-metal complex directed to functional emissive materials

Planned Research

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Project Area	Coordination Asymmetry: Design of Asymmetric Coordination Sphere and Anisotropic Assembly for the Creation of Functional Molecules
Project/Area Number	16H06516
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Science and Engineering
Research Institution	Osaka University
Principal Investigator	Naota Takeshi 大阪大学, 基礎工学研究科, 教授 (20164113)
Co-Investigator(Kenkyū-buntansha)	川守田創一郎大阪大学, 基礎工学研究科, 助教 (00708472)
Project Period (FY)	2016-06-30 – 2021-03-31
Keywords	超分子キラリティー / りん光 / 白金錯体 / CPL / 固体発光 / 分子集合
Outline of Final Research Achievements	In this study, we constructed a variety of three-dimensional metal structures with planar chirality by combining various phosphorescent transition metal platforms with organic linkers, and investigated relationship between their molecular mobility and assembly-chirality ability, and luminescence properties, to develop highly functional luminescent materials. First, we selected hetero-atom coordination platinum complexes with flexible coordination planes, which have potential luminescence but are non-luminescent in solution state at room temperature, and constructed novel luminescent materials with various planar chirality having unique three-dimensional structures such as wavelike, washcloth, and tongue.Then, we developed the chiral assembly and accumulation method of them, and clarified the relationship between molecular assembly state and chiral optical properties.
Free Research Field	有機化学錯体化学
Academic Significance and Societal Importance of the Research Achievements	本研究は金属錯体の配位構造に由来する面性キラリティーを有する分子の集合・会合状態に注目し、濃度変化や結晶状態変化などの凝集状態に依存した金属錯体の運動性や会合特性に由来するキラルな光物性の制御を達成した。キラルな光物性は暗号化技術や3Dディスプレイなどに応用が期待される技術であるが、遷移金属錯体の有するd軌道と配位子が作る特異な励起状態をどのように高効率のキラル光物性として取り出すか、その設計指針は乏しい。今回は配位平面に柔軟性を有する平面白金錯体に有機リンカーを導入することでキラル構造を強く光物性に反映できるユニークな発光性分子を構築できた点は学術および社会的にも意義深い。