Pentacoordinated iron(II) complexes with 2,6-bis[(imino)ethyl]pyridine- Schiff base ligands as new catalyst systems mediated atom transfer radical polymerization of (meth)acrylate monomers

Adnan Abu-Surrah, Khalid A. Ibrahim, Maher Y. Abdalla, Ayman A. Issa

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

2,6-bis[1-(cis)-myrtanylimino)ethyl]pyridineiron(II) chloride (2) and 2,6-bis[(1-phenylimino)ethyl]pyridineiron(II) chloride (3) were investigated as novel complexes for iron-mediated atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) and tert-butyl acrylate (tBA) using toluene as the solvent, and ethyl 2-bromoisobutyrate as the initiator. A catalyst/initiator molar ratio as low as 0.1/1 was used in order to reduce catalyst contamination to the polymers. Both complexes produced PMMA and PtBA polymers with controlled structures and very low molecular weight distributions as low as 1.07, in particular for complex 3. High to moderate conversions (30-45%) were obtained in 20 h, although very diluted amount of catalyst was used and in the absence of any reducing agent which indicates an efficient catalyst system. The resulting polymers were characterized by NMR, GPC, and DSC. Syndio-rich atactic poly(t-BA) and poly(MMA) with relatively high [rr] diads (50%, 42%, respectively) were isolated.

Original languageEnglish (US)
Pages (from-to)59-66
Number of pages8
JournalJournal of Polymer Research
Volume18
Issue number1
DOIs
StatePublished - Jan 2011

Keywords

  • ATRP
  • Bis(imino)pyridineiron(II) complexes
  • Methyl methacrylate
  • Molecular weight distribution
  • Tacticity
  • Tert-Butylacrylate

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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