PHOTOELECTRON SPECTROSCOPIC STUDY ON METALLOOCTAETHYLPORPHYRINS
PHOTOELECTRON SPECTROSCOPIC STUDY ON METALLOOCTAETHYLPORPHYRINS
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DOI：
10.1021/ic50195a038
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发表时间：
1979-01-01
影响因子：
4.6
通讯作者：
SATO, N
中科院分区：
文献类型：
--
作者：
KITAGAWA, S;MORISHIMA, I;SATO, N
给出了八乙基卟啉（H2OEP）及其含多种二价阳离子（Mg、Fe、Co、Ni、Cu、Zn、Pd）的金属衍生物的紫外光电子（PE）光谱。6-7 eV的前两个能带的光谱位置对应于卟啉体系（Alu和A2u态）的电子喷射，显示出金属依赖性。第一（和第二）电离电位与通过循环伏安法获得的OEP环氧化相关的半波电位有很好的相关性。在此关系的基础上，与SCE相比，具有二价Fe和Co原子的OEP衍生物的环氧化电位估计为0.4 V，这仍然超出了实验观察范围。7 ~ 9ev波段也表现出明显的金属依赖性，可能是卟啉体系的电子抛射。
The UV photoelectron (PE) spectra of octaethylporphyrin (H2OEP) and its metallo derivatives containing a variety of divalent cations (Mg, Fe, Co, Ni, Cu, Zn, Pd) are presented. The spectral positions of the first twobands at 6-7 eV which correspond to an electron ejection from the porphyrin system (Alu and A2u states) show a metal dependence. The first (and the second) ionization potential well correlates to the half-wave potential associated with the OEP ring oxidation obtained by cyclic voltametry. On the basis of this relationship, the ring oxidation potentials for the OEP derivatives with divalent Fe and Co atoms, which have still been beyondexperimental observation, are estimated to be 0.4 V vs. SCE. The bands between 7 and 9 eV, which also exhibit a remarkable metal dependence, may be assigned to an electron ejection from the porphyrin system.