School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
Phys Chem Chem Phys. 2010 Jul 7;12(25):6666-71. doi: 10.1039/b921656a. Epub 2010 Apr 13.
The growth and ordering of 5-(10,15,20-triphenylporphyrinatonickel(ii))dimer (NiTPP-dimer) molecules on the Ag(111) surface have been investigated using scanning tunnelling microscopy/spectroscopy (STM/STS) and low-energy electron diffraction (LEED). At one monolayer (ML) coverage the NiTPP-dimer forms a well-ordered close-packed molecular layer in which the porphyrin molecules have a flat orientation with the molecular plane lying parallel to the substrate. STM and LEED data obtained from one monolayer of the NiTPP-dimer on the Ag(111) surface show the formation of three domains which grow along the main crystallographic directions of the substrate. Scanning tunnelling spectroscopy data obtained from the NiTPP-dimer on the Ag(111) surface show good agreement with optical band gap measurements and density functional theory calculations.
使用扫描隧道显微镜/光谱（STM/STS）和低能电子衍射（LEED）研究了 5-（10,15,20-三苯基卟啉镍（II）二聚体（NiTPP-二聚体）分子在 Ag（111）表面上的生长和有序性。在单层（ML）覆盖度下，NiTPP-二聚体形成了一个有序的密排分子层，其中卟啉分子具有平面取向，分子平面平行于基底。从 Ag（111）表面上的 NiTPP-二聚体单层获得的 STM 和 LEED 数据表明，形成了三个沿基底主要晶向生长的畴。从 Ag（111）表面上的 NiTPP-二聚体获得的扫描隧道光谱数据与光学带隙测量和密度泛函理论计算吻合较好。
