Spin Crossover in Anionic Cobalt-Bridged Fullerene (Bu4N+){Co(Ph3P)}2(μ2-Cl–)(μ2-η2,η2-C60)2 Dimers

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• 作者：Dmitri V. KonarevSalavat S. Khasanov ; Alexander F. Shestakov ; Manabu Ishikawa ; Akihiro Otsuka ; Hideki Yamochi ; Gunzi Saito ; Rimma N. Lyubovskaya
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：December 28, 2016
• 年：2016
• 卷：138
• 期：51
• 页码：16592-16595
• 全文大小：336K
• ISSN：1520-5126

文摘

A spin crossover phenomena is observed in an anionic (Bu₄N⁺){Co(Ph₃P)}₂(μ₂-Cl^–)(μ₂-η²,η²-C₆₀)₂·2C₆H₁₄ (1) complex in which two cobalt atoms bridge two fullerene molecules to form a dimer. The dimer has a triplet ground state with two weakly coupling Co⁰ atoms (S = 1/2). The spin transition realized above 150 K is accompanied by a cobalt-to-fullerene charge transfer that forms a quintet excited state with a high spin Co^I (S = 1) and C₆₀^•– (S = 1/2).