Molecular orientation of terephthalic acid assembly on epitaxial graphene: NEXAFS and XPS study

被引：68

作者：

Zhang, Wenhua ^{[1
,2
]}

Nefedov, Alexei ^{[1
]}

Naboka, Michael ^{[1
]}

Cao, Liang ^{[2
]}

Woell, Christof ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Funct Interfaces IFG, D-76344 Eggenstein Leopoldshafen, Germany

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 29期

基金：

国家教育部科学基金资助;

关键词：

RUTILE TIO2(110); BENZOIC-ACID; ADSORPTION; SURFACE; PHASE; DEPROTONATION; SPECTROSCOPY; PYRIDINE; BENZENE;

D O I：

10.1039/c2cp23748b

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：

The adsorption of terephthalic acid molecules [C6H4(COOH)(2)), TPA] on a single layer of graphene grown epitaxially on Ni(111) has been investigated by means of near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS) at room temperature. The assignment of the NEXAFS resonances was aided by ab initio calculations for the free TPA molecule. For coverages up to a monolayer the molecular plane of TPA adopts a parallel orientation with regard to the epitaxial graphene (EG) layer. Deprotonation of TPA molecules at one monolayer coverage can be excluded. For TPA multilayers, the molecular plane is tilted on average by approximately 45 degrees with respect to the sample surface.

引用

页码：10125 / 10131

页数：7

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