Ultraviolet photoelectron spectra of ( Y C ) 2 @ C 82 and Y 2 @ C 82
Ultraviolet photoelectron spectra of ( Y C ) 2 @ C 82 and Y 2 @ C 82
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DOI：
10.1103/physrevb.72.195424
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发表时间：
2005-11
影响因子：
3.7
通讯作者：
S. Hino;N. Wanita;K. Iwasaki;D. Yoshimura;T. Akachi;Takeshi Inoue;Yasuhiro Ito;T. Sugai;H. Shinohara
中科院分区：
文献类型：
--
作者：
S. Hino;N. Wanita;K. Iwasaki;D. Yoshimura;T. Akachi;Takeshi Inoue;Yasuhiro Ito;T. Sugai;H. Shinohara
利用同步辐射光源测量了金属富勒烯、（III）和（III）的紫外光电子能谱（UPS）。光谱的起始能量（III）被确定为低于费米能级0.8 eV，和（III）的，表明这些金属富勒烯的双折射性质。UPS由许多波峰和波谷组成。此外，在调节激发能量时观察到强度的变化;然而，变化的强度不如对其他富勒烯观察到的变化的强度大。两种金属富勒烯的UPS基本相似，尽管它们之间存在微小的差异。（III）的UPS通过分子轨道计算获得的模拟光谱容易地再现，所述分子轨道计算假定笼上具有四个附加电子的（8）笼结构。（III）和（III）的UPS之间的差异光谱表明笼上存在额外的电子。
Ultraviolet photoelectron spectra (UPS) of metallofullerenes,(III) and(III) were measured using a synchrotron radiation light source. The spectral onset energy of(III) was determined to be 0.8 eV below the Fermi level, and that of(III) was, indicating the semiconductive nature of these metallofullerenes. The UPS consisted of numerous crests and troughs. Further, a change in intensity upon tuning the excitation energy was observed; however, the intensity of the change was not as large as those observed for other fullerenes. The UPS of two metallofullerenes basically resemble each other, although there are minute differences between them. The UPS of(III) was easily reproduced by a simulated spectrum obtained by molecular orbital calculations assuming a(8) cage structure with four additional electrons on the cage. A difference spectrum between the UPS of(III) and(III) indicates the existence of additional electrons on the cage of.