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Near-White Light Emission from Organic-Inorganic Hybrid Based on Dinuclear Metal Complexes

Research Project

Project/Area Number 19K05635
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 35030:Organic functional materials-related
Research InstitutionNippon Institute of Technology

Principal Investigator

Osawa Masahisa  日本工業大学, 基幹工学部, 教授 (80280717)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords有機無機ハイブリッド材料 / 遅延蛍光性錯体 / リン光性錯体 / 金二核錯体 / 単分子白色発光 / ハイブリッド材料 / 金(I)二核錯体 / 白色発光 / デュアル発光 / リン光 / 金二核構造 / 量子効率 / 遅延蛍光 / 金一価錯体 / 二核錯体 / 発光材料 / マルチ発光 / 金錯体
Outline of Research at the Start

現在、白色有機ELは主として赤緑青をそれぞれ発光する三種の材料を適切な割合でブレンドすることにより製作されている。もし、単分子で高効率白色発光を示す材料を使用することが可能となれば、生産プロセスの大幅な簡素化が期待できる。本研究の目的は、単分子で高効率白色光を示す有機―無機ハイブリッド材料を合成することである。緑発光材料の合成途中で副生した弱いながらも単分子で白色発光を示す材料の発光メカニズムを検討することで、その高効率化に挑む。

Outline of Final Research Achievements

We found that the dinuclear gold(I) complex by-produced in the synthesis process of the TADF-type gold (I) complex exhibits white luminescence. This material had a structure in which two gold-halogen units extending from the each phosphorus atom are cross-linked at the gold site. In this study, several complexes having this unique structure were synthesized using a bisphosphine ligand in which substituents were introduced, and their optical properties were investigated. As a result, it was revealed that the bulky ligand suppressed structural changes in the excited state of these complexes and improves quantum efficiency. Furthermore, by introducing “tuning unit of emission color" into the luminescent complexes, we succeeded in synthesizing a gold(I) binuclear hybrid material that exhibits almost ideal white light (dual emission).

Academic Significance and Societal Importance of the Research Achievements

白色ELは主としてRGBをそれぞれ発光する三種の材料を適切な割合でブレンドすることにより製作されているが、単分子で高効率白色発光を示す材料を使用することが可能となれば、生産プロセスの大幅な簡素化が期待できる。本研究では、分子の構造と光物性の相関を詳細に調査することで、単分子で高効率白色光を示す有機無機ハイブリッド材料の合成法を見い出した点に学術的かつ社会的意義を有する。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Photoluminescent properties and molecular structures of dinuclear gold(I) complexes with bridged diphosphine ligands: near-unity phosphorescence from 3XMMCT/3MC2020

    • Author(s)
      Masahisa Osawa, Sakie Soma, Mikio Hoshino, Youya Tanaka, Munetaka Akita
    • Journal Title

      Dalton Trans.

      Volume: 49 Pages: 15204-15215

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Luminescence color alteration induced by trapped solvent molecules in crystals of tetrahedral gold(I) complexes: near-unity luminescence mixed with thermally activated delayed fluorescence and phosphorescence2019

    • Author(s)
      Masahisa Osawa, Hiroto Yamayoshi, Mikio Hoshino, Youya Tanaka, Munetaka Akita
    • Journal Title

      Dalton Trans.

      Volume: 48 Issue: 25 Pages: 9094-90103

    • DOI

      10.1039/c9dt01373c

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 二座ホスフィン配位子で架橋した金(I)二核錯体の合成と光特性2021

    • Author(s)
      相馬咲絵・大澤正久・田中裕也・穐田宗隆
    • Organizer
      第11回 CSJ化学フェスタ 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 非対称型配位子を有した銅(I)錯体の合成と光特性2021

    • Author(s)
      吉川直希・大澤正久・田中裕也・穐田宗隆
    • Organizer
      第11回 CSJ化学フェスタ 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Luminescence color alteration Induced by trapped solvent molecules in crystals of tetrahedral gold(I) complexes2021

    • Author(s)
      Salie Soma, Masahisa Osawa, Yuya Tanaka, Munekata Akita
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 発光性金(I)錯体の結晶中に取り込まれた溶媒による発光色変化2021

    • Author(s)
      相馬咲絵, 大澤正久, 田中裕也, 穐田宗隆
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 四面体型金(I)錯体の結晶中に取り込まれた溶媒による発光色変化2020

    • Author(s)
      相馬咲絵, 大澤正久, 田中裕也, 穐田宗隆
    • Organizer
      日本化学会第100春季年会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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