Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1250508 | Vibrational Spectroscopy | 2012 | 5 Pages |
Abstract
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 cmâ1. This band vanishes as transition metal ions are introduced and a new band at 952 cmâ1 appears which is ascribed as a δ(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 ν(OH) region.
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Markus Andersson Trojer, Anders MÃ¥rtensson, Magnus Nydén,