pi-System Figuration for Open-sell Molecular Systems: Developments of Their Synthetic Methods and Functions

2018 Fiscal Year Final Research Report

• Project Area: pi-System Figuration: Control of Electron and Structural Dynamism for Innovative Functions
• Project/Area Number: 26102005
• 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 (2015-2018); Osaka City University (2014)
• Principal Investigator: SUZUKI SHUICHI 大阪大学, 基礎工学研究科, 准教授 (80433291)
• Project Period (FY): 2014-07-10 – 2019-03-31
• Keywords: 開殻π造形 / 高スピン分子 / 電子ドナー / 酸化還元特性 / ラジカル金属錯体

Outline of Final Research Achievements

Nitronyl nitroxides (NN-Rs) and their related radicals have been especially utilized for organic spin sources and their unique spin-related properties have been investigated in view of purely organic ferromagnets, hybrid ferrimagnets, and negative magnetoresistance. NN-Rs are generally prepared via the condensation reactions of a corresponding hydroxyamine with various aldehydes and subsequent oxidation with a stoichiometric amount of oxidant. For the developments of the synthetic strategies for NN-Rs, we have focused on radical-metalloid NN-M systems. We have succeeded in the rapid preparation method of these NN-M. These are found to be stable even under air and could be easily handled. We have also found that that NN-Au, Cu, and Zn can be utilized as reagents of introduction to p-electronic systems via cross coupling reactions. The utility of the present method was demonstrated by the direct synthesis of NN-Rs which could not be prepared via typical condensation-oxidation methods.

Free Research Field

物性有機化学

Academic Significance and Societal Importance of the Research Achievements

従来法では全く手にすることが出来なかった新規開殻pi電子系分子が迅速かつ効率的に合成する手法を見出した。また、本法を利用して合成したスピン源を複数もつ誘導体の詳細を解析することにより、スピン構造の新しい制御法を見出した。これらの研究成果により、今後のスピンを利用するテクノロジーへの基礎的な知見を蓄積した。