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

Zubavichus  Y; Zharnikov  M; Yang  YJFuchs  OHeske  CUmbach  ETzvetkov  GNetzer  FPGrunze  M

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

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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.

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《The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical》 |2005年第2期|884-891|共8页
作者
Zubavichus Y; Zharnikov M; Yang YJFuchs OHeske CUmbach ETzvetkov GNetzer FPGrunze M;
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作者单位

Univ Heidelberg, Angew Phys Chem, INF 253, D-69120 Heidelberg, Germany;

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正文语种英语
中图分类物理化学（理论化学）、化学物理学;
关键词
RAY PHOTOELECTRON-SPECTROSCOPY; INFRARED REFLECTION ABSORPTION; X-RAY; AMINO-ACIDS; TAUTOMERIC EQUILIBRIA; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; METAL-SURFACES; SOLID-STATE; AB-INITIO;

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

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