The ultraviolet spectra of matrix isolated disulfur monoxide and sulfur dioxide

Article abstract of DOI:10.1016/0022-2852(69)90102-7

The absorption spectrum of disulfur monoxide was observed in matrices at 20°K. All 18 observed bands of the (0, 0, ν₃) - (0, 0, 0) progression fit the equation G(ν₃′) = 29 070 + 426 (ν₃′ + 1 2) - 4.80 (ν₃′ + 1 2)² + 0.075 (ν₃′ + 1 2)³. The matrix data was used to reassign the reported gas-phase data and to deduce ν₂′ and ν₂″. The absorption spectrum of sulfur dioxide in a krypton matrix at 20°K is tentatively assigned to a progression A(ν₁, ν₂, 0) ← X(0, 0, 0). The SO₂ a-X phosphorescence, excited by absorption of light in either the C or A system, is strongly enhanced in the matrix. T₀₀, ν₁ and ν₂ shifts are listed for solid argon, krypton, xenon, nitrogen, methane, SF₆, and C₄F₈. The phosphorescence intensity is strongly temperature dependent. The temperature-intensity curves are consistent with an energy transfer model involving interaction of the SO₂ triplet state with the lattice vibration.