Synthesis of some polymer-metal complexes and elucidation of their structures


Sari N., Kahraman E., Sari B., Ozgun A.

JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY, vol.43, no.8, pp.1227-1235, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 8
  • Publication Date: 2006
  • Doi Number: 10.1080/10601320600737484
  • Journal Name: JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1227-1235
  • Keywords: conductivity, complexes, coordination polymer, polyacrylamide, poly(ethlylene glycol), poly(vinyl alcohol), CONDUCTIVITY, DERIVATIVES, STABILITY
  • Gazi University Affiliated: Yes

Abstract

In this study, the nine coordination polymers of Fe(III), Co(II) and Ni(II) salts have been synthesized using polyacrylamide (PAA), polt(ethylene glycol) (PEG) and poly(vinyl alcohol) (PVA) and their structures were characterized by magnetic and conductivity measurements, ultraviolet-visible (UV-VIS), FTIR spectroscopy and thermogravimetric analysis (TGA). The structures of Fe(III) complexes in the all coordination polymers were found as tetrahedral. The structures of PAA-Co(II) coordination polymer was determined as octahedral geometry whereas PEG-Co(II) and PVA-Co(II) complexes showed as tetrahedral structure. PAA-Ni(II) and PEG-Ni(II) complexes have octahedral geometry, whereas PVA-Ni(II) has a square planar structure. Besides, the stress-strain experiments of PVA-metal coordination polymers obtained rubber-like structure were carried out and the value of breaking-strain of PVA-Ni(II) complex was found to be about 17% of vulcanized natural rubber. The conductivities of the resulting polymer-metal complexes were measured by four-probe technique and were found in the range 10(-5) -10(-6) Scm(-1) . Thus, it was suggested that they can be used in the field potential application of conducting polymers. TGA results revealed that among the complexes PEG-Fe(III) and PVA-Fe(III) complexes have the highest thermally stable.