Development of Sigma-delocalized Molecules with Charge Transport Properties and Elucidation of Their Electronic Properties

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K05459
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 33010:Structural organic chemistry and physical organic chemistry-related
• Research Institution: Saitama University
• Principal Investigator: Furukawa Shunsuke 埼玉大学, 理工学研究科, 助教 (70625590)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: σ非局在分子 / 有機半導体 / 有機磁性体 / ハロアレーン

Outline of Final Research Achievements

This study aims to investigate "σ-delocalized molecules" as new units of open-shell structures, elucidate intermolecular interactions within their molecular crystals, and evaluate their magnetic properties and conductivities. As a result of this research, we successfully developed a synthetic method to synthesize the σ-delocalized molecules. Using this method, we synthesized several analogues. The findings have been reported in two peer-reviewed papers. Although we explored the conversion of these molecules into the species with open-shell structures, we did not achieve the target species. We identified the electronic levels of the chemical species as the reason for this outcome.

Free Research Field

物理有機化学

Academic Significance and Societal Importance of the Research Achievements

従来までの有機分子における開殻構造の担い手は、π共役化合物が主たる分子群であり、磁性や導電性といった物性発現の根源となっていた。この根源、つまり分子の電子系の成り立ちが異なる化学種で開殻構造が実現できれば、その物性自体も変化することになる。この候補化合物としてσ非局在分子を提案し、その合成手法を確立できたことは学術的に意義深い。また、この分子系をもとに開殻電子系を構築する手法を模索することは、有機材料の物性に直結し、ものづくりの根幹を成すものである。