Cross-linked and functionalized 'universal polymer backbones' via simple, rapid, and orthogonal multi-site self-assembly

Joel M. Pollino, Kamlesh P. Nair, Ludger P. Stubbs, Jacob Adams, Marcus Weck

Research output: Contribution to journalArticle

Abstract

A novel route to cross-linked and functionalized random copolymers using a rapid, one-step, and orthogonal copolymer cross-linking/functionalization strategy has been developed. Random terpolymers possessing high concentrations of pendant alkyl chains and either (1) palladated-pincer complexes and diaminopyridine moieties (DAD hydrogen-bonding entities) or (2) palladated-pincer complexes and cyanuric wedges (ADAADA hydrogen-bonding entities) have been synthesized using ring-opening metathesis polymerization. Non-covalent cross-linking of the resultant copolymers using a directed functionalization strategy leads to dramatic increases in solution viscosities for cross-linked polymers via metal-coordination while only minor changes in viscosity were observed when hydrogen-bonding motifs were employed for cross-linking. The cross-linked materials could be further functionalized via self-assembly by employing the second recognition motif along the polymeric backbones giving rise to highly functionalized materials with tailored cross-links. This novel non-covalent polymer cross-linking/functionalization strategy allows for rapid and tunable materials synthesis by overcoming many difficulties inherent to the preparation of covalently cross-linked polymers.

Original languageEnglish (US)
Pages (from-to)7205-7215
Number of pages11
JournalTetrahedron
Volume60
Issue number34
DOIs
StatePublished - Aug 16 2004

Keywords

  • Cross-linking
  • Metathesis
  • Polymers
  • Self-assembly

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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