Synthesis and characterization of telechelic phosphine oxide polyesters and cobalt(II) chloride complexes

Qin Lin, Serkan Unal, Ann R. Fornof, R. Scott Armentrout, Timothy E. Long

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


A monofunctional phosphine oxide containing endcapping reagent, 4-carboxyphenyl biphenyl phosphine oxide, was synthesized for the preparation of telechelic polyester oligomers. The chemical structure of the endcapping reagent was verified using NMR spectroscopy, mass spectroscopy, and elemental analysis. Phosphine oxide telechelic polyesters were prepared for the first time via copolymerization of a low molar mass polyester oligomer precursor and the phosphine oxide endcapping reagent in the melt state. The quantitative incorporation of telechelic phosphine oxide functionality was confirmed using 1H NMR spectroscopy and elemental analysis. The corresponding complexes of phosphine oxide terminated polyesters and cobalt(II) chloride were prepared via charging the cobalt salt at the onset of melt polymerization. 31P {1H} NMR spectroscopy, FT-IR spectroscopy, and UV-vis spectroscopy indicated that the cobalt(II) ion preferentially coordinated with the phosphine oxide end groups. The complexes exhibited higher melt viscosity than their salt-free analogues due to the formation of coordinated polymers. The presence of the telechelic phosphine oxide end groups also aided in the homogeneous dispersion of the cobalt salt in a poly(ethylene terephthalate) (PET) matrix.

Original languageEnglish (US)
Pages (from-to)4085-4093
Number of pages9
Issue number11
StatePublished - May 17 2006
Externally publishedYes


  • Macroligands
  • Phosphine oxide
  • Polyesters

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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