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A self-complementary macrocycle by a dual interaction system.

Yuta Sawanaka1, Masahiro Yamashina2, Hiroyoshi Ohtsu1

  • 1Department of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, Japan.

Nature Communications
|September 26, 2022
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Summary
This summary is machine-generated.

Researchers developed a dual interaction system using π-π stacking and hydrogen bonding to create self-complementary macrocycles. This metal-free strategy enables controlled, hierarchical assembly of anthracene-based supramolecular structures.

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Area of Science:

  • Supramolecular Chemistry
  • Organic Chemistry
  • Materials Science

Background:

  • Self-complementary assembly is crucial for forming discrete structures like proteins and capsids.
  • Controlling self-complementary assembly in multiple host-guest systems remains challenging.
  • Anthracene-based molecular tweezers offer potential for novel supramolecular architectures.

Purpose of the Study:

  • To develop a controlled self-complementary assembly system using dual interactions.
  • To construct a macrocycle with higher-order hierarchical structures.
  • To explore metal-free strategies for anthracene-based supramolecular assembly.

Main Methods:

  • Utilized a dual interaction system combining π-π stacking and hydrogen bonding.
  • Employed anthracene-based molecular tweezers exhibiting continuous host-guest behavior during crystallization.
  • Investigated hierarchical assembly in the presence of trifluoroacetic acid.

Main Results:

  • Successfully constructed a self-complementary cyclic hexamer through controlled assembly.
  • Observed hierarchical assembly of the cyclic hexamer into cuboctahedron and rhombohedral structures.
  • Demonstrated a metal-free approach for creating complex supramolecular architectures.

Conclusions:

  • A dual interaction system effectively regulates self-complementary assembly for macrocycle formation.
  • Anthracene-based cyclic hexamers can hierarchically assemble into higher-order structures.
  • This work presents a promising metal-free strategy for designing advanced supramolecular materials.