HCO+ 和 HOC+ 的泛音转变 2ν1：起源、辐射寿命、碰撞淬火。

IF 2.3 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemphyschem Pub Date : 2024-06-05 DOI:10.1002/cphc.202400106

Dr. Miguel Jiménez-Redondo, Liliia Uvarova, Dr. Petr Dohnal, Miroslava Kassayová, Prof. Dr. Paola Caselli, Dr. Pavol Jusko

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引用次数: 0

摘要

我们展示了 HCO+ 和 HOC+ 中 C-H/ O-H 伸展（2ν1）第一泛音振动转变的光谱，该光谱是在低温 22 极射频陷阱内使用激光诱导反应作用方案记录的。带源分别位于 6078.68411(19) 和 6360.17630(26) cm-1。我们介绍了一种基于离子阱质量选择性抛射的技术，用于记录无背景作用光谱。通过改变离子阱内中性作用方案反应物（分别为 CO2 和 Ar）和碰撞伙伴反应物的数量密度，我们估算出了该状态的辐射寿命分别为 1.53(34) ms 和 1.22(34) ms，以及 HCO+(2ν1) 与 He、H2 和 N2 的碰撞淬灭率。

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Overtone Transition 2ν1 of HCO+ and HOC+: Origin, Radiative Lifetime, Collisional Quenching

We present spectra of the first overtone vibration transition of C−H/ O−H stretch (2ν₁) in HCO⁺ and HOC⁺, recorded using a laser induced reaction action scheme inside a cryogenic 22 pole radio frequency trap. Band origins have been located at 6078.68411(19) and 6360.17630(26) cm⁻¹, respectively. We introduce a technique based on mass selective ejection from the ion trap for recording background free action spectra. Varying the number density of the neutral action scheme reactant (CO₂ and Ar, respectively) and collisional partner reactant inside the ion trap, permitted us to estimate the radiative lifetime of the state to be 1.53(34) and 1.22(34) ms, respectively, and the collisional quenching rates of HCO⁺(2ν₁) with He, H₂, and N₂.

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来源期刊

Chemphyschem 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

3.40%

发文量

425

审稿时长

1.1 months

期刊介绍： ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.