Structure of the Ethylammonium Nitrate Surface: An X-ray Reflectivity and Vibrational Sum Frequency Spectroscopy Study

vibrational sum frequency air interface spectroscopy Nitrates ethylammonium nitrate (EAN) X-ray reflectivity 02 engineering and technology Reflectivity 01 natural sciences 0104 chemical sciences Symmetry X-ray spectroscopy Vibrational states 0210 nano-technology Molecular structure
DOI: 10.1021/la904697g Publication Date: 2010-03-19T19:37:06Z
ABSTRACT
X-ray reflectivity and vibrational sum frequency spectroscopy are used to probe the structure of ethylammonium nitrate (EAN)−air interface. reveals that EAN−air interface is structured consists alternating nonpolar charged layers extend 31 Å into bulk. Vibrational interfacial cations have their ethyl moieties oriented toward air, with CH3 C3 axis positioned ∼36.5° from normal. This invariant between 15 51 °C. On account its molecular symmetry, orientation anion cannot be determined certainty.
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