论文标题
红外光谱（CO $ _2 $）$ _ 2 $ -RG TRIMERS，RG = NE，AR，KR和XE
Infrared spectra of (CO$_2$)$_2$-Rg trimers, Rg = Ne, Ar, Kr, and Xe
论文作者
论文摘要
（CO $ _2 $）$ _ 2 $ -RG TRIMERS（RG = NE，AR，KR，KR和XE）的高分辨率光谱在CO2 NU3 NU3基本的区域（〜2350 cm $^{ - 1} $），使用可调的Opo激光源来探测脉冲脉冲脉冲量的Supersonic Supersonic Supersonic Suppersonic Supersonic Sperpersonic Sperpersonic Sperpersonic Supersonic Supersonic Sperperonic Sperpersonic Supersonic Spepersonic Speplesion。这些（CO $ _2 $）$ _ 2 $ -RG过渡往往会由于其他物种而隐藏在更强的光谱中，例如CO $ _2 $ -RG和（CO $ _2 $）$ _ 2 $。每个三聚机由（Co $ _2 $）$ _ 2 $单位组成，类似于免费的二氧化碳二聚体（平面平行的平行）以及位于二聚体C $ _2 $对称轴的平面外的RG原子，但是（CO $ _2 $）$ _ 2 $ _2 $单位可能不保留Planar in dimere dimere。实验结构表明，三线中的C-RG键长与相应的CO $ _2 $ -RG二聚体中的C-RG键长相似。同样，相对于（CO $ _2 $）$ _ 2 $本身的振动频段原点移动与Co $ _2 $ -RG相对于CO $ _2 $的振动频段移动。
High resolution spectra of (CO$_2$)$_2$-Rg trimers (Rg = Ne, Ar, Kr, and Xe) in the region of the CO2 nu3 fundamental (~2350 cm$^{-1}$) are reported, using a tunable OPO laser source to probe a pulsed supersonic slit jet expansion. These (CO$_2$)$_2$-Rg transitions tend to be hidden among stronger spectra due to other species, such as CO$_2$-Rg and (CO$_2$)$_2$. Each trimer consists of a (CO$_2$)$_2$ unit which is similar to the free carbon dioxide dimer (planar parallel staggered) plus an Rg atom located out-of-plane on the dimer C$_2$ symmetry axis, but the (CO$_2$)$_2$ unit may not remain exactly planar in the dimer. Experimental structures show that the C-Rg bond lengths in the trimers are similar to those in the corresponding CO$_2$-Rg dimers. As well, the vibrational band origin shifts, relative to (CO$_2$)$_2$ itself, are similar to those of CO$_2$-Rg relative to CO$_2$.
