Study of the spin state of dimetallofullerene anions by multi-frequency ESR

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05481
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional solid state chemistry
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Kodama Takeshi 首都大学東京, 理工学研究科, 准教授 (20285092)
• Co-Investigator(Kenkyū-buntansha): 古川 貢 新潟大学, 研究推進機構, 准教授 (90342633) ; 加藤 立久 京都大学, 国際高等教育院, 教授 (80175702)
• Research Collaborator: NAKATORI Natsumi ; MITANI Takuji ; KOBAYASHI Kazuhiro ; NISHIMOTO Shinya ; TAKAI Ryoya ; YOSHIDA Shun
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 複核金属内包フラーレン / スピン状態 / 多周波数ＥＳＲ

Outline of Final Research Achievements

Isolation method of M2@C80, which is only stable in its anion form, was developed for Y2@C80 as a typical example. Gd2@Cn(n=78,80) anions were isolated and it was shown that their spin states were S=15/2 by ESR spectroscopy. In addition, GdM@C78(M=Sc, La) anions, in which M is a metal with no spin, were also isolated and it was clarified that their spin states were S=4 by ESR spectroscopy. As a result, it was confirmed that the interaction between a spin S=7/2 for Gd and a spin S=1/2 for an electron on the dimer MO is ferromagnetic. It was demonstrated that the spin state for Tm2@C78 anion is described by an effective spin S=1/2. Theoretical calculation for M2@Cn anion was also performed.

Free Research Field

物理化学