Electronic spectrum of the diacetylene radical cation in solid rare gases

V. E. Bondybey, J. H. English

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


The matrix isolation and laser induced fluorescence techniques are applied to the study of the electronic spectrum of C4H2 + and its deuterated varieties. The ion is produced in solid Ne in several distinct sites by VUV photoionization of the parent diacetylene. The major site shows a vibronically well resolved X2II g→A2IIu fluorescence spectrum. Comparison of the fundamental frequencies with the gas phase values shows in most cases negligible perturbation by the solid medium (< 0.05%). Study of the fluorescence excitation spectra provides new information about the upper state vibrational potential function.

Original languageEnglish
Pages (from-to)777-782
Number of pages6
JournalJournal of Chemical Physics
Issue number2
StatePublished - 1979
Externally publishedYes


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