Structure of the ethylammonium nitrate surface: an x-ray reflectivity and vibrational sum frequency spectroscopy study
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Date
2010-06-01
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Publisher
American Chemical Society
Abstract
X-ray reflectivity and vibrational sum frequency spectroscopy are used to probe the structure of the ethylammonium nitrate (EAN)−air interface. X-ray reflectivity reveals that the EAN−air interface is structured and consists of alternating nonpolar and charged layers that extend 31 Å into the bulk. Vibrational sum frequency spectroscopy reveals interfacial cations have their ethyl moieties oriented toward air, with the CH3 C3 axis positioned 36.5° from interface normal. This structure is invariant between 15 and 51°C. On account of its molecular symmetry, the orientation of the nitrate anion cannot be determined with certainty. © 2010, American Chemical Society
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Keywords
Nitrates, Reflectivity, Vibrational states, X-ray spectroscopy, Symmetry, Molecular structure
Citation
Niga, P., Wakeham, D., Nelson, A., Warr, G. G., Rutland, M., & Atkin, R. (2010). Structure of the ethylammonium nitrate surface: an x-ray reflectivity and vibrational sum frequency spectroscopy study. Langmuir, 26(11), 8282-8288. doi:10.1021/la904697g