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Main‐Chain Supramolecular Polymers Based on Orthogonal Benzo‐21‐Crown‐7/Secondary Ammonium Salt and Terpyridine/Metal Ion Recognition Motifs
Author(s) -
Tian YuKui,
Wang Feng
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300742
Subject(s) - supramolecular chemistry , terpyridine , monomer , supramolecular polymers , metal ions in aqueous solution , polymer chemistry , polymer , chemistry , salt (chemistry) , ammonium , metal , molecular recognition , materials science , organic chemistry , molecule
Orthogonal self‐assembly of multiple components represents an efficient strategy to afford hierarchical and multifunctional assemblies. Here, we demonstrate the orthogonal recognition behaviors between benzo‐21‐crown‐7/secondary ammonium salt and terpyridine/metal ions (Fe 2+ or Zn 2+ ) recognition motifs. Main‐chain supramolecular polymers are subsequently achieved via “one‐pot” mixing of the three monomers together (heteroditopic monomer 1 , homoditopic secondary ammonium salt monomer 2, and Fe(BF 4 ) 2 •6H 2 O or Zn(OTf) 2 ), which are confirmed by 1 H NMR, UV–Vis, DOSY, and viscosity measurements. Moreover, different metal ions (Fe 2+ or Zn 2+ ) exert considerable effects on the size of the resulting supramolecular polymers. Integration of two different types of non‐covalent interactions renders dynamic and responsive properties for the resulting supramolecular polymers, as triggered by a variety of external stimuli such as temperature, potassium cation, as well as stronger chelating ligands. Therefore, the current work is a prerequisite for the future application of such orthogonal assemblies as intelligent supramolecular materials.