Supramolecular-like-complexation and electrochromic luminescence properties on a interface of heterogeneous type compounds via chemical bonding

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15041
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 26030:Composite materials and interfaces-related
• Research Institution: Aoyama Gakuin University
• Principal Investigator: Ohmagari Hitomi 青山学院大学, 理工学部, 助教 (40846797)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 発光性複合膜 / 希土類錯体 / 酸化グラフェン

Outline of Final Research Achievements

The development of luminescence materials which can be controlled by an electric field is one of the most important studies. In this study, a carbon material with a nanosheet structure, graphene oxide (GO), was hybridized via chemical bonding with lanthanide complexes known as a strong luminescent material to develop a new luminescent carbon material that exhibits strong luminescence. The color of hybrid film is black but shows red and green luminescence under ultraviolet light irradiation.
Graphene oxide becomes conductive by heat treatment. On the other hand, the hybrid film was almost an insulator even after heat treatment. As a future perspective, we aim to add conductive ionic liquid to the hybrid film to develop a novel electrofluorochromic material.

Free Research Field

無機化学、錯体化学、光化学

Academic Significance and Societal Importance of the Research Achievements

本研究は、二次元薄膜炭素材料である酸化グラフェン(GO)に発光特性を付与した新規発光性炭素材料の開発に成功した。本来優れた蛍光消光性のあるGOに蛍光特性をもたせることは学術的に非常に難しいとされていた。そこで導入する発光性分子の構造に炭素鎖を組み込み、GOと発光中心の間にスペースを構築することで、発光性の炭素材料の開発に成功した。さらにこの複合膜はろ紙のように自立したフィルムとして取り出すことができる。このような炭素材料はこれまで報告がなく、コスト削減やデバイスの軽量化に有用とされる炭素材料に一石を投じる結果である。