Jet-cooled rovibrational absorption spectra of SO₂–H₂O and SO₂–D₂O complexes have been measured in the v₁ symmetric stretching region of SO₂ around 1151 cm⁻¹ using a segmented rapid-scan quantum cascade laser spectrometer. The rovibrational spectrum of SO₂–D₂O has also been measured in the v₂ bending region of D₂O around 1178 cm⁻¹. The tunneling splittings caused by the internal rotation of the water unit could not be resolved under our experimental conditions. The observed rovibrational transitions for these two complexes are analyzed using a standard A-reduced Watson asymmetric top Hamiltonian, yielding precise molecular constants for the excited vibrational states. The experimental band-origins are 1156.713866(70) cm⁻¹ for SO₂–H₂O and 1156.819797(66) cm⁻¹ for SO₂–D₂O in the v₁ region of SO₂, and 1180.177901(58) cm⁻¹ for SO₂–D₂O in the v₂ region of D₂O.

使用分段快速扫描量子级联激光光谱仪在SO ₂约1151 cm ^-1的v ₁对称伸缩区域测量了SO ₂ –H ₂ O和SO ₂ –D ₂ O复合物的喷射冷却振动吸收光谱。_{SO 2} –D ₂ O的振动光谱也在D _{2 O的}v ₂弯曲区域1178 cm ^-1附近测量。在我们的实验条件下无法解决由水单元内部旋转引起的隧道开裂问题。使用标准A约化 Watson 不对称顶部哈密顿量对观察到的这两种配合物的振动跃迁进行分析，从而得出激发振动态的精确分子常数。_{SO 2} v ₁区域中SO ₂ –H ₂ O的实验带源为 1156.713866(70) cm ^{−1 ，SO 2 –D 2 O 的实验带源为 1156.819797(66) cm −1} ， SO ₂ –D ₂ O 区域中SO ₂ –D ₂ O的实验带源为1180.177901(58) cm ^{−1 。}v _{2 D 2} O区域。