Development of Emissive Gold Complexes Exhibiting Innovative Photo- and Mechano-Responsivity

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02784
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 35030:Organic functional materials-related
• Research Institution: Shizuoka University (2020-2021); Hokkaido University (2019)
• Principal Investigator: Seki Tomohiro 静岡大学, 理学部, 講師 (50638187)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 相転移 / 発光 / 結晶 / メカノクロミズム / 金錯体

Outline of Final Research Achievements

One gold complex formed a crystal structure based on cyclic hexamers connected via 6-fold aurophilic interactions. Because this cyclic hexamers are stacked to provide 1-D channel moiety, a variety of guest molecules (more than 20 guests) can be included. Depending on the guest molecules, photoluminescence properties can be controlled. Another gold complex produced a crystal that can be bent upon applying mechanical stress without breakage. The XRD study indicates that the resulting bent crystal is a twin single crystal. We also reported other crystals that can show salient effect by temperature change and photoirradiation. The underlying mechanism for the crystal jump is based on the behaviors of crystal structure changes different from each other.

Free Research Field

機能性分子材料

Academic Significance and Societal Importance of the Research Achievements

金錯体を用いた刺激応答性の分子結晶材料の開発に取り組み、数多くの未知刺激応答性を明らかにしてきた。例えば、金錯体としてこれまで未知の結晶構造モチーフの形成に成功し、金錯体が元来持つ発光特性の環境敏感性との相乗により、特異なセンシング機能の付与に成功している。その他にも発光性を有する初の強弾性特性の開発やマルチ刺激応答性の機械的応答材料の開発に成功している。これまでに未知の刺激応答性を世の中に発信するという当初の目的が大いに達成されたと言える。