Electronic spectrum of the diacetylene radical cation in solid rare gases

摘要: The matrix isolation and laser induced fluorescence techniques are applied to the study of electronic spectrum C4H+2 its deuterated varieties. ion is produced in solid Ne several distinct sites by VUV photoionization parent diacetylene. major site shows a vibronically well resolved X2Πg→A2Πu spectrum. Comparison fundamental frequencies with gas phase values most cases negligible perturbation medium (<0.05%). Study excitation spectra provides new information about upper state vibrational potential function.