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A potential novel rapid screening NMR approach to boundary film formation at solid interfaces in contact with ionic liquids
journal contribution
posted on 2008-09-11, 00:00 authored by Maria ForsythMaria Forsyth, T Kemp, Patrick HowlettPatrick Howlett, J Sun, M SmithThe boundary films generated on a series of inorganic compounds, typical of native films on metal and ceramic surfaces, when exposed to various ionic liquids (ILs) based on the trihexyl(tetradecyl)phosphonium cation have been characterized using multinuclear solid-state NMR. The NMR results indicate that SiO2 and Mg(OH)2 interact strongly with the anion and cation of each IL through a mechanism of adsorption of the anion and subsequent close proximity of the cation in a surface double layer (as observed through 1H−29Si cross polarization experiments). In contrast, Al2O3, MgO, ZnO, and ZrO2 appear less active, strongly suggesting the necessity of hydroxylated surface groups in order to enhance the generation of these interfacial films. Using solid-state NMR to characterize such interfaces not only has the potential to elucidate mechanisms of wear resistance and corrosion protection via ILs, but is also likely to allow their rapid screening for such durability applications.
History
Journal
Journal of physical chemistry Part C : nanomaterials and interfacesVolume
112Issue
36Pagination
13801 - 13804Publisher
American Chemical SocietyLocation
Washington, D.C.Publisher DOI
ISSN
1932-7447eISSN
1932-7455Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2008, American Chemical SocietyUsage metrics
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