Interplay of fidelity, binding strength, and structure in supramolecular polymers

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108 Scopus citations


In studies of a supramolecular network of polymers formed by self-association of UPy or UG recognition units displayed along a poly(butyl methacrylate) (PBMA) backbone, it was unexpectedly found that the more weakly dimerizing (Kdimer ≈ 200 M-1) UG unit produced more assembly than did the very strongly dimerizing UPy unit (Kdimer = 2 × 107 M-1). Likewise, in examining supramolecular blends mediated by the heterocomplexation of DAN and UPy, which occurs upon the mixing of polystyrene containing the DAN unit (PS-DAN) and PBMA-UPy, increasing the mol % of UPy did not produce increased viscosity. 1H NMR showed that both observations can be explained by the intramolecular recognition of UPy. Structural studies show that the length of the chain linking the UPy unit to the backbone is critical, with longer linkers favoring intermolecular dimers. An interplay of linker chain length, polymer Mw, recognition unit mol %, and fidelity determines the extent of network growth.

Original languageEnglish
Pages (from-to)14236-14237
Number of pages2
JournalJournal of the American Chemical Society
Issue number44
StatePublished - 8 Nov 2006
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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