Ferromagnetic Spin Coupling between Endohedral Metallofullerene La@C82 and a Cyclodimeric Copper Porphyrin upon Inclusion

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• 作者：Fatin Hajjaj ; Kentaro Tashiro ; Hidefumi Nikawa ; Naomi Mizorogi ; Takeshi Akasaka ; Shigeru Nagase ; Ko Furukawa ; Tatsuhisa Kato ; Takuzo Aida
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：June 22, 2011
• 年：2011
• 卷：133
• 期：24
• 页码：9290-9292
• 全文大小：754K
• 年卷期：v.133,no.24(June 22, 2011)
• ISSN：1520-5126

文摘

The cyclic host cyclo-[P_Cu]₂ carrying two covalently connected Cu(II) porphyrin units can accommodate La@C₈₂, a paramagnetic endohedral metallofullerene, in its cavity to form the inclusion complex cyclo-[P_Cu]₂La@C₈₂, which can be transformed into the caged complex cage-[P_Cu]₂La@C₈₂ by ring-closing olefin metathesis of its side-chain olefinic termini. On the basis of electron spin resonance (ESR) and electron spin transient nutation (ESTN) studies, cyclo-[P_Cu]₂La@C₈₂ is the first ferromagnetically coupled inclusion complex featuring La@C₈₂, whereas cage-[P_Cu]₂La@C₈₂ is ferrimagnetic.