Baker Cortés Brian D, Enache Mihaela, Küster Kathrin, Studener Florian, Lee Tien-Lin, Marets Nicolas, Bulach Véronique, Hosseini Mir Wais, Stöhr Meike
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
Present address: Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569, Stuttgart, Germany.
Chemistry. 2021 Aug 25;27(48):12430-12436. doi: 10.1002/chem.202101217. Epub 2021 Jul 22.
The self-assembly of a nickel-porphyrin derivative (Ni-DPPyP) containing two pyridyl coordinating sites and two pentyl chains at trans meso positions was studied with scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED) on Au(111). Deposition of Ni-DPPyP onto Au(111) gave rise to a close-packed network for coverages smaller or equal to one monolayer as revealed by STM and LEED. The molecular arrangement of this two-dimensional network is stabilized via hydrogen bonds formed between the pyridyl's nitrogen and hydrogen atoms from the pyrrole groups of neighboring molecules. Subsequent deposition of cobalt atoms onto the close-packed network and post-deposition annealing at 423 K led to the formation of a Co-coordinated hexagonal porous network. As confirmed by XPS measurements, the porous network is stabilized by metal-ligand interactions between one cobalt atom and three pyridyl ligands, each pyridyl ligand coming from a different Ni-DPPyP molecule.
利用扫描隧道显微镜（STM）、X射线光电子能谱（XPS）和低能电子衍射（LEED）在Au(111)上研究了一种在反式中位含有两个吡啶基配位位点和两条戊基链的镍卟啉衍生物（Ni-DPPyP）的自组装。如STM和LEED所示，将Ni-DPPyP沉积到Au(111)上，对于小于或等于一个单层的覆盖度会产生一个密排网络。这个二维网络的分子排列通过相邻分子吡咯基团的吡啶基氮原子与氢原子之间形成的氢键得以稳定。随后将钴原子沉积到密排网络上并在423 K进行沉积后退火，导致形成了一个钴配位的六边形多孔网络。如XPS测量所证实的，多孔网络通过一个钴原子与三个吡啶基配体之间的金属 - 配体相互作用得以稳定，每个吡啶基配体来自不同的Ni-DPPyP分子。
