Fritsche Lukas, Bach Andreas, Miloglyadova Larisa, Tsybizova Alexandra, Chen Peter
Laboratorium für Organische Chemie, ETH Zurich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland.
Rev Sci Instrum. 2018 Jun;89(6):063119. doi: 10.1063/1.5026973.
We present the design of the newly constructed cryogenic Fourier-transform ion cyclotron resonance (FT-ICR) ion trap for infrared ion spectroscopy. Trapped ions are collisionally cooled by the pulsed introduction of buffer gas into the cell. Using different buffer gases and cell temperatures, we record action spectra of weakly bound neutral gas-analyte complexes with an IR laser source. We show for the first time that ion-He complexes can be observed in an ICR cell at temperatures around 4 K. We compare the experimental vibrational spectra of Ag(PPh) obtained by tagging with different neutral gases: He, Ne, Ar, H, and N to computed vibrational spectra. Furthermore, the conditions necessary for the formation of neutral tags within an ICR ion trap are studied.
我们展示了新构建的用于红外离子光谱的低温傅里叶变换离子回旋共振（FT-ICR）离子阱的设计。通过向池中脉冲引入缓冲气体，捕获的离子被碰撞冷却。使用不同的缓冲气体和池温度，我们用红外激光源记录了弱束缚中性气体 - 分析物复合物的作用光谱。我们首次表明，在约4K的温度下，可以在ICR池中观察到离子 - 氦复合物。我们将通过用不同中性气体（He、Ne、Ar、H和N）标记获得的Ag(PPh)的实验振动光谱与计算得到的振动光谱进行比较。此外，还研究了在ICR离子阱中形成中性标签所需的条件。
