Rotationally Resolved Spectrum of the Degenerate Antisymmetric C–H Stretching Band of c-C3H3+

IF 2.9 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Earth and Space Chemistry Pub Date : 2025-04-02 DOI:10.1021/acsearthspacechem.5c0003210.1021/acsearthspacechem.5c00032

Divita Gupta, Philipp C. Schmid, Thomas Salomon, Oskar Asvany and Stephan Schlemmer*,

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Abstract

The rotationally resolved spectrum of the degenerate ν₄ antisymmetric C–H stretching band of the cyclopropenyl cation, c-C₃H₃⁺, the smallest aromatic hydrocarbon cation, has been recorded employing leak-out-spectroscopy (LOS) in a cryogenic 22-pole ion trap instrument operated at T = 42 K. About 370 lines were measured in the region 3110–3150 cm^–1 and assigned to rovibrational transitions of the fundamental antisymmetric C–H stretching band. Spectroscopic parameters have been refined compared to the previous experimental work from the group of Harold Linnartz [Zhao et al., Astrophys. J. Lett. 2014, 791, L28] and previous high-level theoretical predictions [Huang et al., J. Phys. Chem. A 2011, 115, 5005–5016]. Details of the spectral signatures allow for a thorough comparison of action spectroscopy in low-temperature ion traps to cavity ring down spectroscopy in a free-jet cooled discharge.

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c-C3H3+的简并反对称C-H拉伸带的旋转分辨谱

在温度为42 K的22极低温离子阱中，利用漏出光谱（LOS）记录了最小的芳烃阳离子环丙烯阳离子c-C3H3+简并ν4反对称C-H伸缩带的旋转分辨光谱。在3110-3150 cm-1区域测量了约370条线，并将其分配给基本反对称C-H拉伸带的旋转振动跃迁。与Harold Linnartz [Zhao等人，astrophysics]先前的实验工作相比，光谱参数已经得到了改进。J. Lett. 2014, 791， L28]和之前的高水平理论预测[Huang et， J. Phys. 2014]。化学。[j].农业工程学报，2011,32(5):559 - 567。光谱特征的细节允许对低温离子阱中的作用光谱与自由射流冷却放电中的腔环下降光谱进行彻底的比较。

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来源期刊

ACS Earth and Space Chemistry Earth and Planetary Sciences-Geochemistry and Petrology

CiteScore

5.30

自引率

11.80%

发文量

249

期刊介绍： The scope of ACS Earth and Space Chemistry includes the application of analytical, experimental and theoretical chemistry to investigate research questions relevant to the Earth and Space. The journal encompasses the highly interdisciplinary nature of research in this area, while emphasizing chemistry and chemical research tools as the unifying theme. The journal publishes broadly in the domains of high- and low-temperature geochemistry, atmospheric chemistry, marine chemistry, planetary chemistry, astrochemistry, and analytical geochemistry. ACS Earth and Space Chemistry publishes Articles, Letters, Reviews, and Features to provide flexible formats to readily communicate all aspects of research in these fields.