Replacement of H-bonded bridged water by transition metal ions in poly(1-vinylimidazole-co-methylmethacrylate) copolymers: A vibrational spectroscopy study using mid-FTIR, far-FTIR and ab initio calculations
Journal article, 2012

A detailed structural analysis of the vibrational spectra of hydrophobic PVM (poly(1-vinylimidazole-co-methylmethacrylate)) copolymers PVM-4 (4 wt% 1-VIm) and PVM-44 (44 wt% 1-VIm) is provided with respect to bridging water and subsequent replacement by bridging transition metal ions. PVM-44 (44 wt% 1-VIm) with a high fraction of 1-VIm forms water bridges as evident by the water bending vibration, which is shifted up to 1665 cm(-1). This band vanishes as transition metal ions are introduced and a new band at 952 cm(-1) appears which is ascribed as a delta(ring) band involving the entire [M(Im)(n)](2+) unit. This fact is affirmed using ab initio calculations. The transition metal ions coordinate exclusively the imidazole groups. Although the imidazole associated water is replaced by transition metal ions, the amount of sorbed water for the very hydrophobic PVM-4 is increased as indicated by the nu(OH) region.

coordination

1-

chemistry

coatings

Bridged water

monomers

spectra

containing polymers

histidine

chelating resins

release

B3LYP hybrid functional

imidazole complexes

Methyl methacrylate

Author

Markus Andersson Trojer

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

SuMo Biomaterials

Anders Mårtensson

Chalmers, Chemical and Biological Engineering, Polymer Technology

Magnus Nydén

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

SuMo Biomaterials

Vibrational Spectroscopy

0924-2031 (ISSN)

Vol. 61 38-42

Subject Categories

Chemical Sciences

DOI

10.1016/j.vibspec.2012.02.017

More information

Latest update

8/18/2020