Charge transfer transitions of the O2+-Ar and O2+-N2 complexes.

Electronic transitions are observed for the O2+-Ar and O2+-N2 complexes over the 225-350 nm range. The transitions are not associated with recognized electronic band systems of the respective atomic and diatomic constituents (Ar+, Ar, O2+, O2, N2+, and N2) but rather are due to charge transfer transitions. Onsets of the O2+-Ar and O2+-N2 band systems occur at 3.

Electronic Spectra of Diacetylene Cations (HCH) Tagged with Ar and N.

Electronic spectra of mass-selected HCH-Ar ( = 1-3) and HCH-(N) ( = 1-2) complexes are measured over the 290-530 nm range using resonance-enhanced photodissociation spectroscopy in a tandem mass spectrometer. Vibronic transitions in the visible region are compared with previous experimental and theoretical results for the ÃΠ ← X̃Π band system of HCH. Hole burning experiments confirm that transitions over the 290-340 nm range involve the diacetylene cation (HCH).