Formation of a Pillar[5]arene‐Based Two‐Dimensional Poly‐Pseudo‐Rotaxane: Threading and Crosslinking by the Same Guest Molecules

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  • Eunji Lee
    Department of Chemistry and Research Institute of Natural Science Gyeongsang National University Jinju 52828 South Korea
  • In‐Hyeok Park
    Department of Chemistry and Research Institute of Natural Science Gyeongsang National University Jinju 52828 South Korea
  • Huiyeong Ju
    Department of Chemistry and Research Institute of Natural Science Gyeongsang National University Jinju 52828 South Korea
  • Seulgi Kim
    Department of Chemistry and Research Institute of Natural Science Gyeongsang National University Jinju 52828 South Korea
  • Jong Hwa Jung
    Department of Chemistry and Research Institute of Natural Science Gyeongsang National University Jinju 52828 South Korea
  • Yoichi Habata
    Department of Chemistry Toho University 2-2-1 Miyama Funabashi Chiba 274-8510 Japan
  • Shim Sung Lee
    Department of Chemistry and Research Institute of Natural Science Gyeongsang National University Jinju 52828 South Korea

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<jats:title>Abstract</jats:title><jats:p>A one‐pot reaction of the A1/A2‐thiopyridyl pillar[5]arene <jats:bold>L</jats:bold> with silver(I) trifluoroacetate in the presence of the linear dinitrile guest <jats:bold>C8</jats:bold>, [CN(CH<jats:sub>2</jats:sub>)<jats:sub><jats:italic>n</jats:italic></jats:sub>CN, <jats:italic>n=</jats:italic>8], afforded the first example of a two‐dimensional (2D) poly‐pseudo‐rotaxane {[(μ<jats:sub>4</jats:sub>‐Ag)<jats:sub>2</jats:sub>(<jats:bold>C8</jats:bold>@<jats:bold>L</jats:bold>)<jats:sub>2</jats:sub>(μ<jats:bold>‐C8</jats:bold>)](CF<jats:sub>3</jats:sub>CO<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>}<jats:sub><jats:italic>n</jats:italic></jats:sub>. Surprisingly, in this structure the <jats:bold>C8</jats:bold> guest not only threads into the pillar[5]arene unit but also crosslinks the 1D coordinative polymeric arrays. The formation of the 2D poly‐pseudo‐rotaxane is driven by an adaptive rearrangement of the components that minimizes the steric clashes not only between the threaded guests but also between the threaded and crosslinked guests where crosslinking occurs. A pathway for the formation of the 2D poly‐pseudo‐rotaxane is proposed.</jats:p>

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