Vinylimidazole copolymers: coordination chemistry, solubility, and cross-linking as function of Cu2+ and Zn2+ complexation
Journal article, 2011

P(1-VIm-co-MMA) copolymers with 4 or 44 wt.% 1-VIm (abbreviated PVM-4 and PVM-44) where polymerized from 1-VIm (1-vinylimidazole) and methylmethacrylate with azobisisobutyronitrile as initiator and reacted with either Cu(2+) or Zn(2+). The resulting coordinated polymer complexes were studied using ICP-AES, CP/MAS (13)C NMR, conductivity measurements, vibrational spectroscopy (mid-FTIR and far-FTIR), DSC, and EPR. It was established by ICP-AES, CP/MAS (13)C NMR, conductivity, mid-FTIR and EPR measurements that the transition metal ions in the complexes were exclusively coordinated by the imidazole ligand. The coordination geometry is square planar with regard to Cu(II) complexes. The strong interaction between the polymeric imidazole ligand and the transition metal ion cross-links the system, resulting in augmentation of T (g) (the glass transition temperature), especially for copolymers with high relative amount of 1-VIm. The effect of changing metal ion is more complicated and depends on both the strength of the coordinate interaction as well as the coordination number. The solubility of the coordinate polymer complex in conventional solvents is low due to the coordinate cross-links. However, the coordinate polymer complexes are soluble in strongly coordinating solvents such as acetonitrile and dimethylsulfoxide.

metal-ions

spectra

Vibrational spectroscopy

nmr

DSC

field

EPR

cu(ii)

raman

poly(methyl methacrylate)

Glass transition

internal phase-separation

imidazole complexes

core/polymer shell microcapsules

temperature

1-vinylimidazole

Coordinated polymer

Author

Markus Andersson

SuMo Biomaterials

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Örjan Hansson

University of Gothenburg

Lars Öhrström

Chalmers, Chemical and Biological Engineering, Physical Chemistry

Alexander Idström

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

SuMo Biomaterials

Magnus Nydén

SuMo Biomaterials

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Colloid and Polymer Science

0303-402X (ISSN) 1435-1536 (eISSN)

Vol. 289 12 1361-1372

Subject Categories

Polymer Chemistry

Inorganic Chemistry

Biophysics

Roots

Basic sciences

Areas of Advance

Materials Science

DOI

10.1007/s00396-011-2461-5

More information

Latest update

11/5/2018