Carbon K-Shell X-Ray Absorption Near-Edge Structure of Solid C60

Carbon K-Shell X-Ray Absorption Near-Edge Structure of Solid C60
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固体C60的碳K壳X射线吸收近边结构

DOI：
10.1143/jjap.30.l848
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Y. Udagawa
Y. Udagawa
中科院分区：
--
文献类型：
--
作者：
H. Shinohara;Hiroyasu Sato;Y. Saito;K. Tohji;Y. Udagawa

文献摘要

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首次报道了固体C60碳k边以上的吸收测量，利用100-1,000 eV同步辐射。在XANES （x射线吸收近边结构）光谱中存在明显的π*共振，表明C60簇含有大量的sp2杂化碳键。C60的π*带在285和288 eV处有两个峰，表明存在“笼形应变”π键网络。此外，σ*共振的频带宽度和光谱特征表明，其长程顺序不如石墨和金刚石明显。
Absorption measurements above the carbon K-edge of solid C60 have been reported for the first time, which utilize 100-1,000 eV synchrotron radiation. The C60 cluster contains a significant fraction of sp2 hybridized carbon bonds as revealed by the presence of a prominent π* resonance in the XANES (X-ray Absorption Near-Edge Structure) spectrum. The π* band in C60 is characterized by the two humps at 285 and 288 eV, suggesting the presence of a “cage-strained” π-bond network. Furthermore, the band width and the spectral feature of the σ* resonance imply that the long-range order is less distinct than in graphite or diamond.