Ion-Ion pairing in aqueous solutions of imidazolium chloride
The structure factors of aqueous (D2O) solutions of 3m d-5 imidazolium chloride, 3m imidazolium chloride (natural abundance) and an equimolar mixture of the previous two solutions will be measured. Similar sets of three measurements will be performed on a 3m imidazole solution and a mixture of 1.5m imidazole and 1.5m imidazolium chloride. From these measurements the function SHnonHnon(Q) and gHnonHnon(r) (where Hnon are the non-exchangeable hydrogens) containing information on the ion-ion structure will be determined. This will provide the first structural data on the imidazolium-imidazolium ion pairing, and how this varies with the protonation state of this species. Given the importance of the imidazole motif in the side-chain of the amino-acid histidine, and its common occurance in the active sites of enzymes, this study will be of significant importance.
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JUNGWIRTH Pavel; Henry E. Fischer; HLADILKOVA Jana and MASON Philip. (2012). Ion-Ion pairing in aqueous solutions of imidazolium chloride. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.8-03-779
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