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Metal Ion Selective Self-Assembly of a Ligand Functionalized Polymer into [1+1] Macrocyclic and Supramolecular Polymer Structures via Metal-Ligand Coordination.

Authors
  • Xu, Xiaowen1
  • Van Guyse, Joachim F R1
  • Jerca, Valentin Victor1, 2
  • Hoogenboom, Richard1
  • 1 Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium. , (Belgium)
  • 2 Centre of Organic Chemistry "Costin D. Nenitzescu" Romanian Academy, Spl. Independentei 202B, 060023, Bucharest, Romania. , (Oman)
Type
Published Article
Journal
Macromolecular rapid communications
Publication Date
Jan 01, 2020
Volume
41
Issue
1
Identifiers
DOI: 10.1002/marc.201900305
PMID: 31418964
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The design and synthesis of polymer-based metallomacrocycles relying on metal-ligand interactions remain a challenge in the polymer field. Instead of utilizing chemical reactions to synthesize macrocycles, a general approach is proposed to construct metallomacrocyclic structures through supramolecular self-assembly of a specific macroligand with suitable transition metal ions. Therefore, a new ditopic macroligand (L) consisting of PEG end-capped with 2,6-bis(1,2,3-triazol-4-yl)pyridine derivatives is prepared via CuAAC "click" reaction. Four types of metal (Fe2+ , Zn2+ , Ni2+ , and Cu2+ ) complexes are obtained by simply mixing a solution of metal ions and L in appropriate concentrations. The investigation of the coordination chemistry suggests that coordination of L with Cu2+ results in the formation of a [1+1] metallomacrocycle, while the other metal complexes exclusively lead to the formation of linear metallopolymers and/or larger aggregates. This work provides new insights into designing metallomacrocycles and may have potential application in the synthesis of catenanes and other cyclic or cycle-based topological architectures. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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