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Observation of Paramagnetic Raman Optical Activity of Nitrogen Dioxide
Author(s) -
Šebestík Jaroslav,
Bouř Petr
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201403887
Subject(s) - raman optical activity , paramagnetism , raman spectroscopy , polarizability , chemistry , nuclear magnetic resonance , signal (programming language) , molecular physics , molecule , intensity (physics) , nitrogen dioxide , magnetic field , optics , analytical chemistry (journal) , condensed matter physics , physics , organic chemistry , computer science , programming language , chromatography , quantum mechanics
Raman optical activity (ROA) detects the intensity difference between right and left circularly polarized scattered light, and thus brings about enhanced information about the molecules under investigation. The difference is quite small and the technique is mostly constrained to the condensed phase. For NO 2 in the presence of a static magnetic field, however, the ROA signal with high ROA/Raman intensity ratio was observed. The signal is so strong owing to molecular paramagnetism and a pre‐resonance signal enhancement. The spectral shape was explained on the basis of the Fermi golden rule and rotational wave functions expanded to a spherical top basis. The results indicate that the technique can be immediately used to obtain information about molecular properties, such as polarizability components. It also has a potential to detect other paramagnetic gases and discriminate among them.