Solvent influence on the orthogonality of noncovalently functionalized terpolymers

Caroline Burd, Marcus Weck

Research output: Contribution to journalArticle

Abstract

Poly(norbornene) terpolymers containing palladated sulfur-carbon-sulfur (SCS) pincer complexes, cyanuric acid, and thymine moieties in their side-chains were synthesized by ring-opening metathesis polymerization. Functionalization of the terpolymers was achieved by self-assembling (i) the Hamilton wedge to the cyanuric acid receptor, (ii) diaminopyridine to the thymine receptor, and (iii) pyridine to the palladated pincer complexes. While all three noncovalent interactions are fully orthogonal to each other in dichloromethane, the employment of a dioxane/chloroform solvent mixture results in the quantitative disassembly of one of the hydrogen bonding recognition units (the Hamilton wedge:cyanuric acid pair) during the metal-coor-dination event. This disassembly is completely independent from the diaminopyridine: thymine hydrogen-bonding pair and allows for the selective removal of one of the side-chain functionalities. This removal occurs with a switch-type mechanism: as one functionality is put on (the pyridine), another one (the Hamilton-wedge receptor) is taken off quantitatively.

Original languageEnglish (US)
Pages (from-to)1936-1944
Number of pages9
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume46
Issue number6
DOIs
StatePublished - Mar 15 2008

Keywords

  • Copolymers
  • ROMP
  • Self-assembly
  • Supramolecular

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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