Synthesizing Highly Regular Single-Layer Alkynyl-Silver Networks at the Micrometer Scale via Gas-Mediated Surface Reaction.
Synthesizing Highly Regular Single-Layer Alkynyl-Silver Networks at the Micrometer Scale via Gas-Mediated Surface Reaction.
复制标题
DOI：
10.1021/jacs.8b13547
复制
发表时间：
2019-03
影响因子：
15
通讯作者：
Yi‐Qi Zhang;T. Paintner;Raphael Hellwig;F. Haag;F. Allegretti;P. Feulner;S. Klyatskaya;M. Ruben
中科院分区：
文献类型：
--
作者：
Yi‐Qi Zhang;T. Paintner;Raphael Hellwig;F. Haag;F. Allegretti;P. Feulner;S. Klyatskaya;M. Ruben
在超高真空条件下，通过气体介导的表面反应方案在贵金属表面上合成了扩展的有机金属蜂窝状炔基银网络。具体来说，受控暴露于分子氧可以有效地使吸附在Ag(111)上的1,3,5-三(4-乙炔基苯基)苯(Ext-TEB)前体的末端炔烃部分去质子化。在 Tsub = 200 K 时，这种 O2 介导的反应途径具有高化学选择性，且不会毒害表面。通过温和退火至 375 K，包含基底原子的长程有序炔基银网络逐渐形成，具有 Ag-双乙炔基序、高结构质量和规则排列的纳米孔，范德华腔约为 8.3 nm2。
Extended organometallic honeycomb alkynyl-silver networks have been synthesized on a noble metal surface under ultrahigh vacuum conditions via a gas-mediated surface reaction protocol. Specifically, the controlled exposure to molecular oxygen efficiently deprotonates terminal alkyne moieties of 1,3,5-tris(4-ethynylphenyl)benzene (Ext-TEB) precursors adsorbed on Ag(111). At Tsub = 200 K, this O2-mediated reaction pathway features high chemoselectivity without poisoning the surface. Through mild annealing to 375 K, long-range ordered alkynyl-silver networks incorporating substrate atoms evolve, featuring Ag- bis-acetylide motifs, high structural quality and a regular arrangement of nanopores with a van der Waals cavity of ≈8.3 nm2.