Formation and Spectroscopy of Dicyanotriacetylene (NC sub(8)N) in Solid Kr

Thermally induced creation of dicyanotriacetylene (NC sub(8)N) was observed in solid krypton. Samples were obtained by cryogenic trapping of gaseous cyanoacetylene/Kr mixtures subjected to electric discharges. Strong a super(3) capital sigma super(+) sub(u) arrow right X super(1) capital sigma super...

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Published inThe journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Vol. 119; no. 11; pp. 2701 - 2708
Main Authors Turowski, Michal, Crepin, Claudine, Douin, Stephane, Kolos, Robert
Format Journal Article
LanguageEnglish
Published 09.03.2015
Subjects
Clouds
Elongation
Formations
Phosphorescence
Physical chemistry
Precursors
Spectroscopy
Trapping
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Summary:Thermally induced creation of dicyanotriacetylene (NC sub(8)N) was observed in solid krypton. Samples were obtained by cryogenic trapping of gaseous cyanoacetylene/Kr mixtures subjected to electric discharges. Strong a super(3) capital sigma super(+) sub(u) arrow right X super(1) capital sigma super(+) sub(g) phosphorescence of NC sub(8)N is reported here for the first time; its vibronic structure permitted the measurement of several ground-state vibrational frequencies. Other chemical species, mostly smaller than the precursor molecule, have also been formed, among them the dicarbon molecule (C sub(2)), and these may serve as indispensable building blocks in the NC sub(8)N synthesis. Processes leading to the elongation of cyanoacetylenic chains are of potential importance for the chemistry of icy grains present in the interstellar gas clouds.
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ISSN:1089-5639
1520-5215
DOI:10.1021/jp509908z