Electronic Structures of Porphyrins and their Interfaces with Metals Studied by UV Photoemission
Electronic Structures of Porphyrins and their Interfaces with Metals Studied by UV Photoemission
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紫外光电发射研究卟啉的电子结构及其与金属的界面
DOI：
10.1080/10587259708032338
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发表时间：
1997
影响因子：
0.7
通讯作者：
K. Yamashita
中科院分区：
文献类型：
--
作者：
H. Ishii;S. Hasegawa;D. Yoshimura;K. Sugiyama;S. Narioka;M. Sei;Y. Ouchi;K. Seki;Y. Harima;K. Yamashita
摘要利用紫外光导光谱（UPS）研究了卟啉类化合物及其与金属界面的电子结构。通过与MOPAC PM3计算比较，可以确定卟啉、5、10、15、20-四苯基卟啉（II） （ZnTPP）、5、10、15、20-四（4-吡啶基）卟啉（H2T(4-Py)P）和5、10、15、20-四苯基卟啉（H2TPP）的UPS光谱特征。卟啉的电子结构可以看作是卟啉和取代基的电子结构的叠加。ZnTPP/金属（Mg, Al, Ag, Au）界面的UPS结果表明，相对于衬底金属的费米能级，ZnTPP能级的能量可以表示为金属功函数的线性函数，并随界面真空能级的移动而变化。线性函数的斜率是一致的。这表明ZnTPP的能级固定在基材金属的真空水平上，界面偶极子恒定。ZnTPP在界面处的水平位置显示…
Abstract The electronic structures of porphyrins and their interfaces with metals were investigated by UV photoemission spectroscopy (UPS). The UPS spectral features of porphine, 5,10,15,20-tetraphenylporphynatozinc(II) (ZnTPP), 5,10,15,20-tetra(4-pyridyl)porphyrin (H2T(4-Py)P) and 5,10,15,20-tetraphenylporphyrin (H2TPP) could be assigned by comparison with MOPAC PM3 calculations. The electronic structures of the porphyrins can be regarded as the superposition of those of porphine and the substituents. The UPS results for ZnTPP/metal (Mg, Al, Ag, Au) interfaces indicated that the energies of the levels of ZnTPP relative to the Fermi level of substrate metals could be expressed as linear functions of the work function of metals with a shift of the vacuum level at interface. The slope of the linear functions was about unity. This indicates that the energy levels of ZnTPP are fixed to the vacuum level of substrate metal with constant interfacial dipole. The level positions of ZnTPP at the interface exhibited...
DOI：
10.1016/0368-2048(82)85046-9
发表时间：
1982
影响因子：
1.9
作者：
M. Robin
通讯作者：
M. Robin