Electronic structure of 1 ML NTCDA/Ag(111) studied by photoemission spectroscopy

被引：47

作者：

Bendounan, Azzedine ^{[1
]}

Forster, Frank ^{[1
]}

Schoell, Achim ^{[1
]}

Batchelor, David ^{[1
]}

Ziroff, Johannes ^{[1
]}

Umbach, Eberhard ^{[1
]}

Reinert, Friedrich ^{[1
]}

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

来源：

SURFACE SCIENCE | 2007年 / 601卷 / 18期

关键词：

angle resolved photoemission; resonant photoemission; surface electronic phenomena; organic molecules; organic films; NTCDA;

D O I：

10.1016/j.susc.2007.04.054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We performed high-resolution photoemission experiments at different photon energies to investigate the valence band structure of I ML of 1,4,5,8-naphthalene tetracarboxylic dianhydride (NTCDA) on Ag(111). Besides the known occupied molecular orbitals HOMO and HOMO - 1 we observe a new state close to the Fermi level, which results from the interaction between NTCDA and the substrate, partially filling the lowest unoccupied orbital of the free molecule (LUMO) in the monolayer system. By tuning the photon energy through the carbon K-edge, a resonance like change of the spectral intensity at the HOMO and HOMO - 1 energies is clearly revealed, which we use for an assignment of the individual spectral features to a predominant localization either at the naphthalene core or the anhydride group. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：4013 / 4017

页数：5

共 33 条

[1] Site-selective adsorption of naphthalene-tetracarboxylic-dianhydride on Ag(110): First-principles calculations [J].