哑铃
化学
富勒烯
激发态
光激发
化学物理
电荷(物理)
原子物理学
计算化学
物理
有机化学
量子力学
物理疗法
医学
作者
Yongqiang Chai,Liping Liu,Yanjun Xu,Xiaolong Liu,Chong Wang,Yifan Bo,Yuhe Zhang,Zhuan Wang,Yuxiang Weng,Dirk M. Guldi,Bo Wu,Chunru Wang
摘要
Several dumbbell conjugates featuring M3N@Ih-C80 (M = Sc, Y) and C60 were prepared to systematically investigate interfullerene electronic interactions and excited state dynamics. From electrochemical investigations, we concluded that the redox potentials of our M3N@Ih-C80 (M = Sc, Y) dumbbells depend largely on the interfullerene electronic interactions. Assisted by DFT calculation, the unique role of metal atoms was highlighted. Most importantly, ultrafast spectroscopy experiments revealed symmetry-breaking charge separation in Sc3N@C80-dumbbell to yield an unprecedented (Sc3N@C80)•+-(Sc3N@C80)•- charge separated state. This is, to the best of our knowledge, the first time that symmetry-breaking charge separation following photoexcitation is corroborated in a fullerene system. As such, our work shed light on the significance of interfullerene electronic interactions and their uniqueness for modulating excited state properties.
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