4.3-3.6微米区间水-CO₂复合物的红外光谱及HDO-CO₂基态隧穿分裂的测定
Infrared spectra of the water-CO2 complex in the 4.3-3.6 micron region and determination of the ground state tunneling splitting for HDO-CO2
AI总结：
本研究利用可调谐中红外光源探测脉冲狭缝射流超声膨胀，首次在多个红外区间观测到不同水同位素-CO₂二聚体的光谱，测定了基态隧穿分裂等参数，为相关势能面理论计算提供严格检验。
摘要：
本研究利用可调谐中红外光源探测脉冲狭缝射流超声膨胀，研究水-CO₂二聚体的光谱。首次在CO₂ ν₃基频区（~2350 cm⁻¹）观测到H₂O-CO₂和D₂O-CO₂，在D₂O ν₃基频区（~2790 cm⁻¹）也观测到D₂O-CO₂，在HDO的O-D伸缩基频区（~2720 cm⁻¹）观测到HDO-CO₂，均为这些区间的首次观测。光谱分析得到了激发态转动参数和振动位移，还首次获得了D₂O-CO₂（0.003 cm⁻¹）和HDO-CO₂（0.0234 cm⁻¹）基态内转动隧穿分裂的实验值。后者的直接测定得益于HDO-CO₂对称性的降低。这些结果为理论水-CO₂势能面计算提供了严格且易于解释的检验依据。
英文摘要：
Spectra of water-CO2 dimers are studied using a tunable mid-infrared source to probe a pulsed slit jet supersonic expansion. H2O-CO2 and D2O-CO2 are observed in the CO2 nu3 fundamental region (~2350 cm-1), D2O-CO2 is also observed in the D2O nu3 fundamental region (~2790 cm-1), and HDO-CO2 is observed in the HDO O-D stretch fundamental region (~2720 cm-1), all for the first time in these regions. Analysis of the spectra yields excited state rotational parameters and vibrational shifts. They also yield the first experimental values of the ground state internal rotation tunneling splittings for D2O-CO2 (0.003 cm-1) and HDO-CO2 (0.0234 cm-1). The latter value is a direct determination made possible by the reduced symmetry of HDO-CO2. These results provide stringent and easily interpreted tests for theoretical water - CO2 potential energy surface calculations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
