原位扫描隧道显微镜研究亚酞菁和亚萘酞菁在 Au(111)电极上的吸附层。

In situ scanning tunneling microscopy investigation of subphthalocyanine and subnaphthalocyanine adlayers on a Au(111) electrode.

机构信息

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.

出版信息

Langmuir. 2013 Jan 8;29(1):264-70. doi: 10.1021/la3042742. Epub 2012 Dec 24.

DOI:10.1021/la3042742

PMID:23227883

Abstract

The adsorption behaviors of subphthalocyanine (SubPc) and subnaphthalocyanine (SubNc) on the Au(111) surface were investigated by electrochemical scanning tunneling microscopy (ECSTM). Two types of ordered adlayer structures of SubPc were observed at 550 mV versus the reversible hydrogen electrode (RHE). All of the SubPc molecules take the Cl-down adsorption configuration on Au(111) in both structures. The ordered adlayers exist in the potential range between 350 and 650 mV. The SubNc molecules adsorb on Au(111) in a less-ordered pattern than the SubPc molecules. The present work provides direct evidence for understanding the potential-controlled adsorption behaviors of SubPc and SubNc on the Au(111) surface.

摘要

通过电化学扫描隧道显微镜（ECSTM）研究了次酞菁（SubPc）和次萘酞菁（SubNc）在 Au(111) 表面的吸附行为。在相对于可逆氢电极（RHE）的 550 mV 下观察到两种类型的 SubPc 有序吸附层结构。在这两种结构中，所有 SubPc 分子均采用 Cl-down 吸附构型在 Au(111)上。有序吸附层存在于 350 和 650 mV 之间的电位范围内。SubNc 分子在 Au(111)上的吸附方式比 SubPc 分子的吸附方式更为无序。本工作为理解 SubPc 和 SubNc 在 Au(111)表面的电位控制吸附行为提供了直接证据。