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Nobuhiko Hosono1, Kenichiro Omoto, Susumu Kitagawa

  • 1Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University Institute for Advanced Study, Kyoto University Yoshida Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan. nhosono@icems.kyoto-u.ac.jp kitagawa@icems.kyoto-u.ac.jp.

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Summary
This summary is machine-generated.

Polymeric ligands and azobenzene molecules self-assemble with copper ions to create unique star-shaped coordination polymers. These structures feature polymeric chains extending from a central metal-organic core.

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Area of Science:

  • Coordination chemistry
  • Polymer science
  • Materials science

Background:

  • Metal-organic frameworks (MOFs) and coordination polymers are built from metal ions and organic linkers.
  • Self-assembly is a key process for creating complex molecular architectures.
  • Azobenzene derivatives offer photoresponsive properties.

Purpose of the Study:

  • To synthesize novel anisotropic coordination star polymers.
  • To investigate the self-sorting behavior of end-functionalized polymeric ligands and azobenzene linkers with Cu2+.
  • To explore the formation of star polymers with polymeric chains grafted from a metal-organic polyhedral core.

Main Methods:

  • Utilizing end-functionalized polymeric ligands (macroligands).
  • Employing azobenzene-3,3'-dicarboxylic acid as a linker.
  • Self-assembly in the presence of Cu2+ ions.

Main Results:

  • Successful formation of anisotropic coordination star polymers.
  • Demonstration of self-sorting leading to star polymer architecture.
  • Polymeric chains are grafted from polar positions of the metal-organic polyhedral core.

Conclusions:

  • End-functionalized polymeric ligands and azobenzene linkers can self-sort with Cu2+ to form star polymers.
  • The resulting structures exhibit anisotropic properties due to their star shape and grafted polymeric arms.
  • This work provides a pathway for designing complex, functional coordination polymers.