4.7 Article

Creating supramolecular semiregular Archimedean tilings via gas-mediated deprotonation of a terminal alkyne derivative

期刊

CRYSTENGCOMM
卷 23, 期 44, 页码 7822-7830

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ce01413g

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资金

  1. National Natural Science Foundation of China [11825405, 1192780039]
  2. Strategic Priority Research Program of the Chinese Academy of Sciences [XDB30000000]
  3. German Research Foundation (DFG) through the Excellence Cluster Munich Center for Advanced Photonics
  4. ERC Advanced Grant MolArt [247299]
  5. DFG-priority programs [1459, TR88]
  6. KNMF facility (KIT, Germany)
  7. [KL 2294/6-1]

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By combining surface-confined reactions with supramolecular self-assembly, simple molecular precursors can be transformed into higher-level tectons to generate complex tessellations with unique properties. Using low-temperature scanning tunneling microscopy, efficient chemical reactions converting EP precursors into BPE-Ag complexes were confirmed, leading to the formation of three distinct types of nanoporous supramolecular architectures with BPE-Ag dimers as the basic units.
Combining surface-confined reactions with supramolecular self-assembly allows the chemical transformation of simple molecular precursors into higher-level tectons to generate complex tessellations with unique structural and functional properties. Herein, utilizing low-temperature scanning tunnelling microscopy, we firstly confirm a highly efficient chemical reaction converting ethynyl-phenanthrene (EP) precursors into bis(phenanthren-2-yleythnyl)silver (BPE-Ag) complexes adsorbed on Ag(111)/mica at room temperature via a novel oxygen-gas mediated terminal alkyne deprotonation process. Moreover, we show that the BPE-Ag species engage in the formation of three distinct types of long-range ordered nanoporous supramolecular architectures, which can be tuned by the initial EP coverage. For all three phases, the basic tectons were verified to be BPE-Ag dimers with flexible pairing configurations. Intriguingly, our tiling analysis reveals that two phases belong to the (3.6.3.6) class of semiregular Archimedean tiling (AT) and the third expresses a new (3.4.6.4) AT, different from the previously reported related networks. Our results illustrate the potential of the introduced synthesis strategy towards accessing architectures with increased complexity and pave the way towards further control and exploration regarding functional properties of interfacial semiregular ATs.

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