Scanning tunneling microscopy, orbital-mediated tunneling spectroscopy, and ultraviolet photoelectron spectroscopy of nickel(II) octaethylporphyrin deposited from vapor

被引：126
|
作者：
Scudiero, L
Barlow, DE
Hipps, KW [1 ]
机构：
[1] Washington State Univ, Dept Chem, Pullman, WA 99164 USA
[2] Washington State Univ, Mat Sci Program, Pullman, WA 99164 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 05期
关键词：
D O I：
10.1021/jp012436m
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：
Thin films of vapor-deposited Ni(II) octaethylporphyrin (NiOEP) were studied supported on gold. Thin films thermally deposited onto flame-annealed Au(111) were analyzed by ultraviolet photoelectron spectroscopy (UPS) using He I radiation and by X-ray photoelectron spectroscopy (XPS) using Mg Kalpha radiation. Reflectance absorption infrared spectroscopy (RAIRS) was used to study NiOEP films on polycrystalline gold. Scanning tunneling microscopy (STM) and orbital-mediated tunneling spectroscopy (STM-OMTS) were performed on submonolayer films of NiOEP supported on Au(111). The highest occupied pi molecular orbitals of the porphyrin ring were seen in both STM-OMTS and in UPS at about 6.4 and 6.8 eV below the vacuum level. The lowest unoccupied pi* molecular orbital of the porphyrin ring also was observed by STM-OMTS to be located near 3.4 eV below the vacuum level.
引用
收藏
页码：996 / 1003
页数：8
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