On-surface formation of metal-organic coordination networks with CAgC and C=OAg interactions assisted by precursor self-assembly
On-surface formation of metal-organic coordination networks with CAgC and C=OAg interactions assisted by precursor self-assembly
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DOI：
10.1063/5.0038559
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发表时间：
2021-01-28
影响因子：
4.4
通讯作者：
Jiang, Nan
中科院分区：
文献类型：
--
作者：
Schultz, Jeremy F.;Yang, Bing;Jiang, Nan
表面结合反应通常用于通过自下而上组装来开发纳米结构。前体分子经过精心设计，并选择表面以制造低维扩展网络，其可以包括一维和二维结构。包含官能团可以提供利用独特化学来进一步调整自下而上方法或形成新型纳米结构的机会。具体而言，羰基基团为表面配位化学开辟了新的途径。本文研究了3，6-二溴-9，10-菲醌（DBPQ）分子在Ag（100）和Ag（110）表面的热诱导自组装和有机金属物种的形成。低温双真空扫描隧道显微镜揭示了室温下Ag（100）表面形成的由氢键和卤键组成的自组装体。在热退火至300 ℃后，发现Ag（100）上的DBPQ形成由Ullmann样偶联反应的有机金属物种特征和羰基络合物的组合组成的金属-有机配位网络。在Ag（110）上，C-Br键在室温下容易解离，形成无序的有机金属物种。
Surface-bound reactions are commonly employed to develop nanoarchitectures through bottom-up assembly. Precursor molecules are carefully designed, and surfaces are chosen with the intention to fabricate low-dimensional extended networks, which can include one-dimensional and two-dimensional structures. The inclusion of functional groups can offer the opportunity to utilize unique chemistry to further tune the bottom-up method or form novel nanostructures. Specifically, carbonyl groups open up new avenues for on-surface coordination chemistry. Here, the self-assembly and formation of an organometallic species via the thermally induced reaction of 3,6-dibromo-9,10-phenanthrenequinone (DBPQ) molecules were studied on Ag(100) and Ag(110). Low-temperature ultrahigh vacuum scanning tunneling microscopy revealed the room temperature formation of self-assemblies defined by hydrogen and halogen bonds on Ag(100). Following a thermal anneal to 300 degrees C, DBPQ on Ag(100) was found to form metal-organic coordination networks composed of a combination of organometallic species characteristics of Ullmann-like coupling reactions and carbonyl complexes. On Ag(110), the C-Br bonds were found to readily dissociate at room temperature, resulting in the formation of disordered organometallic species.