BN-Patterning of Metallic Substrates through Metal Coordination of Decoupled Borazines.
BN-Patterning of Metallic Substrates through Metal Coordination of Decoupled Borazines.
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DOI：
10.1002/chem.201800849
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发表时间：
2018-06
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通讯作者：
M. Schwarz;M. Garnica;Francesco Fasano;N. Demitri;D. Bonifazi;W. Auwärter
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作者：
M. Schwarz;M. Garnica;Francesco Fasano;N. Demitri;D. Bonifazi;W. Auwärter
我们报道了吡啶封端环硼氮烷衍生物的合成、分子自组装以及利用扫描隧道显微镜和X射线光电子能谱研究其在银和铜表面的电子性质。吡啶官能团的引入，使我们能够实现不同的超分子结构与控制的分子的表面模板的交错。在银表面上，环硼氮烷衍生物通过货车范德华力和氢键相互作用形成密排的六方结构，而在Cu（111）表面上，分子发生金属配位。网状结构的孔隙率和配位对称性取决于铜吸附原子和环硼氮烷配体之间的化学计量比，从而允许不寻常的三重配位Cu-吡啶基网络。最后，光谱测量表明，环硼氮烷核心是电子去耦的金属基板。因此，我们证明，BNC含分子单元可以整合到稳定的金属配位结构的表面上，打开路径图案化，BN掺杂片具有特定的功能，例如，关于极性客体气体的吸附。
We report on the synthesis of pyridine-terminated borazine derivatives, their molecular self-assembly as well as the electronic properties investigated on silver and copper surfaces by means of scanning tunneling microscopy and X-ray photoelectron spectroscopy. The introduction of pyridine functionalities allows us to achieve distinct supramolecular architectures with control of the interdigitation of the molecules by surface templating. On silver surfaces, the borazine derivatives arrange in a dense-packed hexagonal structure through van der Waals and H-bonding interactions, whereas on Cu(111), the molecules undergo metal coordination. The porosity and coordination symmetry of the reticulated structure depends on the stoichiometric ratio between copper adatoms and the borazine ligands, permitting an unusual three-fold coordinated Cu-pyridyl network. Finally, spectroscopy measurements indicate that the borazine core is electronically decoupled from the metallic substrate. We thus demonstrate that BNC-containing molecular units can be integrated into stable metal-coordination architectures on surfaces, opening pathways to patterned, BN-doped sheets with specific functionalities, for example, regarding the adsorption of polar guest gases.