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609083 
Journal Article 
Matrix Isolation Infrared Observation of HxSi(N2)y(x0, 1, 2 and y1, 2) Transient Species Using a 121-nm Vacuum Ultraviolet Photolysis Source 
Jay, CA; Christopher, TD; Daniel, GI; Cynthia, JL; Natalie, CR; Nancy, LS 
2008 
1 
Journal of Physical Chemistry A
ISSN: 1089-5639
EISSN: 1520-5215 
112 
14 
3020-3030 
Vacuum ultraviolet photolysis (121.6 nm) of silane in a nitrogen matrix at 12 K leads to the observation of several transient species, which have been characterized using Fourier transform infrared spectroscopy. Four transient species containing silicon and nitrogen have been observed (SiN2, Si(N2)2, HSiN2, and H2SiN2), and one transient species containing only silicon and hydrogen has been observed. The assignment of the infrared bands due to each of these species is accomplished by performing isotopic substitution experiments (SiD4, 15N2, and mixtures with SiH4and 14N2), matrix annealing experiments, UV−visible photolysis experiments, by comparison with previous experimental matrix isolation frequencies, where available, and for HSiN2and H2SiN2by comparison to B3LYP/aug-cc-pVTZ-calculated vibrational frequencies. The observation and infrared assignment of the HSiN2and H2SiN2molecules in these experiments is significant in that HSiN2has not been previously reported in the matrix isolation literature, and H2SiN2has only been reported once previously by a different route of formation. The energetics of the overall formation pathways for the molecules observed in these experiments is discussed using B3LYP/aug-cc-pVTZ calculations. [ABSTRACT FROM AUTHOR] Copyright of Journal of Physical Chemistry A is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts) 
SILICON; NITRIDES; INFRARED spectroscopy; PHOTOCHEMISTRY