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Electronic spectrum of the diacetylene radical cation in solid rare gases

1979; American Institute of Physics; Volume: 71; Issue: 2 Linguagem: Inglês

10.1063/1.438366

1520-9032

V. E. Bondybey, J. H. English,

Quantum, superfluid, helium dynamics

The matrix isolation and laser induced fluorescence techniques are applied to the study of the electronic spectrum of C4H+2 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 X2Πg→A2Πu 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.