Surface chemistry of ultrathin films of histidine on gold as probed by high-resolution synchrotron photoemission

被引：59

作者：

Zubavichus, Y ^{[1
]}

Zharnikov, M

Yang, YJ

Fuchs, O

Heske, C

Umbach, E

Tzvetkov, G

Netzer, FP

Grunze, M

机构：

[1] Heidelberg Univ, Angew Phys Chem, INF 253, D-69120 Heidelberg, Germany

[2] Russian Acad Sci, Inst Organoelement Cpds, Moscow 119991, Russia

[3] Univ Wurzburg, Dept Expt Phys 2, D-97074 Wurzburg, Germany

[4] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA

[5] Karl Franzens Univ Graz, A-8010 Graz, Austria

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 02期

关键词：

D O I：

10.1021/jp047626m

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：

Procedures for the vacuum deposition of thin histidine films on polycrystalline Au(111) and their characterization with high-resolution synchrotron-radiation-based photoelectron spectroscopy are reported. The chemical form of histidine (anionic vs zwitterionic) and the nature of its interactions with the substrate (strong ionic-covalent vs weak van der Waals bonding) in mono- and multilayer films are analyzed. It is shown that water adsorption on a pre-prepared histidine film at 100 K results in protonation of histidine molecules and partial formation of hydroxyl anions. These chemical effects are carefully differentiated from spectral changes associated with radiation damage of the histidine films.

引用

页码：884 / 891

页数：8

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