Modification of the 3d-Electronic Configuration of Manganese Phthalocyanine at the Interface to Gold
Modification of the 3d-Electronic Configuration of Manganese Phthalocyanine at the Interface to Gold
复制标题
DOI：
10.1021/jp211445n
复制
发表时间：
2012-03-01
影响因子：
3.7
通讯作者：
Chasse, T.
中科院分区：
文献类型：
--
作者：
Petraki, F.;Peisert, H.;Chasse, T.
用同步辐射光源和实验室光激发光谱研究了酞菁锰（MnPc）在多晶和单晶Au上的外延膜的电子结构。覆盖率相关的光电能谱和俄歇能谱表明Mn与Au在界面处存在电子相互作用。偏振相关的N-K边X射线吸收谱（XAS）支持MnPc分子膜在Au（100）面上的平躺取向。不同的峰特征和形状的这些光谱在MnPc相比，其他金属PCs提供了明确的暗示与Mn的分子的d-状态的杂交，和单层光谱的显着修改相对于膜数据表明参与这些氮相关的状态在界面处的电子相互作用。Mn L-边XAS光谱形状的变化以及从单层到多层覆盖的总强度被检测到，再次表明Mn d-态与衬底金属态的局部相互作用。共振光电子能谱用于识别具有Mn特征的价带特征。
The electronic structure of ultrathin films of manganese phthalocyanine (MnPc) on polycrystalline and single crystalline Au has been investigated using photoexcited spectroscopies in the lab and at synchrotron sources. Coverage-dependent photoemission and Auger spectra showed clear evidence for electronic interactions of Mn to Au at the immediate interface. Polarization-dependent N K-edge X-ray absorption spectra (XAS) supported the lying down orientation of MnPc molecular films on Au(100). The different peak features and shapes of these spectra in MnPc compared to other metal Pcs provided clear hints for hybridization with the Mn d-states of the molecule, and significant modifications of the monolayer spectra with respect to the film data indicated the involvement of these nitrogen-related states in electronic interactions at the interface. Changes of the Mn L-edge XAS spectral shape as well as the total intensity going from monolayer to multilayer coverage were detected, again indicating the local interaction of Mn d-states with substrate metal states. Resonant photoemission spectroscopy was utilized to identify valence band features with Mn character.