Volume 58, Issue 33 pp. 11296-11300
Communication

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

Dr. Eunji Lee

Dr. Eunji Lee

Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828 South Korea

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Dr. In-Hyeok Park

Dr. In-Hyeok Park

Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828 South Korea

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Huiyeong Ju

Huiyeong Ju

Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828 South Korea

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Seulgi Kim

Seulgi Kim

Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828 South Korea

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Prof. Jong Hwa Jung

Prof. Jong Hwa Jung

Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828 South Korea

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Prof. Yoichi Habata

Prof. Yoichi Habata

Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi, Chiba, 274-8510 Japan

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Prof. Shim Sung Lee

Corresponding Author

Prof. Shim Sung Lee

Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828 South Korea

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First published: 17 June 2019
Citations: 37

Graphical Abstract

Common thread: A two-dimensional poly-pseudo-rotaxane is reported wherein the guest molecule (C8) serves to thread the pillar[5]arene (L) units as well as crosslink one-dimensional coordinative polymeric arrays. The combination of L and C8 with silver(I) ion affords the first example of a two-dimensional poly-pseudo-rotaxane.

Abstract

A one-pot reaction of the A1/A2-thiopyridyl pillar[5]arene L with silver(I) trifluoroacetate in the presence of the linear dinitrile guest C8, [CN(CH2)nCN, n=8], afforded the first example of a two-dimensional (2D) poly-pseudo-rotaxane {[(μ4-Ag)2(C8@L)2-C8)](CF3CO2)2}n. Surprisingly, in this structure the C8 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.

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