Knowledge Bank

The rotationally resolved laser induced fluorescence spectra for the $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}A\prime -X~\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma +$ electronic transition of AlNC and AlCN were measured in supersonic free expansions. The radicals were prepared by reacting the CN fragments from $CH3CN$ in an Ar plasma with Al atoms evaporated using laser ablation of the metal surface. The electronic spectrum of AlCN was observed at about $2500cm-1$ above that of AlNC reported $previouslya$, and the fluorescence state is much lower than that reported by Gerasimov $etalb$. The rotational structures of both AlNC and AlCN spectra measured by a excitation laser source with $0.03cm-1$ spectral resolution show a typical pattern of bent-linear transition.