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
Artikel i vetenskaplig tidskrift, 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.

1-

monomers

imidazole complexes

containing polymers

release

coatings

coordination

histidine

chemistry

Bridged water

Methyl methacrylate

chelating resins

B3LYP hybrid functional

spectra

Författare

Markus Andersson Trojer

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Anders Mårtensson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Magnus Nydén

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Vibrational Spectroscopy

0924-2031 (ISSN)

Vol. 61 38-42

Ämneskategorier

Kemi

DOI

10.1016/j.vibspec.2012.02.017

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2017-10-08