Fine-tuning of two-dimensional metal-organic nanostructures via alkali-pyridyl coordination.

Fine-tuning of two-dimensional metal-organic nanostructures via alkali-pyridyl coordination.
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通过碱-吡啶基配位微调二维金属-有机纳米结构

DOI:
10.1039/d0na00091d
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发表时间:
2020-05-19
期刊:
影响因子:
4.7
通讯作者:
--
中科院分区:
材料科学3区
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本文报道了在无溶剂真空条件下,通过四吡啶卟啉分子与碱金属卤化物在Ag(111)表面的表面反应,实现了二维碱金属-吡啶配位组装的精细调控。高分辨率扫描隧道形貌和X射线光电子能谱揭示了碱-吡啶配位的形成和卟啉大环核的诱导构象调谐。此外,采用其他不同的碱金属卤化物替代物,我们证明了在亚微米尺度上的金属有机纳米结构的微调。后沉积到所形成的前体层上的Fe产生了二维的层状骨架结构,表现出金属-有机界面的功能化。通过碱金属-吡啶配位实现了二维金属有机纳米结构的微调。
Herein, we report a fine-tuning of the two-dimensional alkali–pyridyl coordination assemblies facilely realized by surface reaction between tetrapyridyl-porphyrin molecules and alkali halides on Ag(111) under a solventless ultrahigh vacuum condition. High-resolution scanning tunneling topography and X-ray photoelectron spectra reveal the formation of alkali–pyridyl coordination and the induced conformational tuning of the porphyrin macrocycle cores. Furthermore, employing other different alkali halide substitutes, we demonstrate a fine-tuning of the metal–organic nanostructures at the sub-Å scale. Postdeposition of Fe onto the as-formed precursor layer yields a two-dimensional bimetallic framework structure, manifesting a functionalization of the metal–organic interfaces. Fine-tuning of 2D metal–organic nanostructures is realized by alkali–pyridyl coordination.
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