Adlayer Structures of DL-Homocysteine and L-Homocysteine Thiolactone on Au(111) Surface: an in situ STM Study
作者： Hui-Min Zhang , Gui-Jin Su , Dong Wang , Li-Jun Wan , Gang Jin
DOI: 10.1016/J.ELECTACTA.2003.12.002
关键词: Electrochemistry 、 Self-assembled monolayer 、 Transition metal 、 Chemistry 、 Molecule 、 Inorganic chemistry 、 Adsorption 、 Scanning tunneling microscope 、 Thiolactone 、 Cyclic voltammetry 、 Crystallography
摘要: The adsorption Of DL-homocysteine (Hcy) and L-homocysteine thiolactone (HTL) on Au(1 1 1) electrode was investigated in 0.1 M HClO4 by cyclic voltammetry situ scanning tunneling microscopy (STM). Hcy HTL molecules formed highly ordered adlayers surface. High-resolution STM images revealed the orientation packing arrangement adlayers. (2root3 x 3root3)R30degrees adlayer structure H-bonds between carboxyl groups were assumed to be responsible for origin of tail-to-tail or head-to-head molecular arrangement, while (4 6) structure, two different orientations appearances found. Structural models proposed
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