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Angew Chem Int Ed Engl. 2014 Jan 13;53(3):738-41. doi: 10.1002/anie.201306876. Epub 2013 Nov 29.

Production of N3 upon photolysis of solid nitrogen at 3 K with synchrotron radiation.

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  • 1National Synchrotron Radiation Research Center, No. 101, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076 (Taiwan).

Abstract

The photodissociation of gaseous molecular nitrogen has been investigated intensively, but the corresponding knowledge in a solid phase is lacking. Irradiation of pure solid nitrogen at 3 K with vacuum-ultraviolet light from a synchrotron produced infrared absorption lines of product l-N3 at 1657.8 and 1652.6 cm(-1). The threshold wavelength to generate l-N3 was determined to be (143.7±1.8) nm, corresponding to an energy of (8.63±0.11) eV. Quantum-chemical calculations support the formation of l-N3 from the reaction N2 +N2, possibly through an activated complex l-N4 upon photoexcitation with energy above 8.63 eV. The results provide a possible application to an understanding of the nitrogen cycle in astronomical environments.

Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KEYWORDS:

dissociation energy; nitrogen; photolysis; synchrotron radiation; ultraviolet light

PMID:
24288252
[PubMed]
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