Isolation and spectroscopy of C2H+ ions in helium droplets

被引：3

作者：

Feinberg, Alexandra J. ^{[1
,5
]}

Erukala, Swetha ^{[1
,6
]}

Moon, Cheol Joo ^{[1
,2
]}

Singh, Amandeep ^{[1
]}

Choi, Myong Yong ^{[3
]}

Vilesov, Andrey F. ^{[1
,4
]}

机构：

[1] Univ Southern Calif, Dept Chem, Los Angeles, CA 90089 USA

[2] Gyeongsang Natl Univ, Res Inst Green Energy Convergence Technol, Jinju 52828, South Korea

[3] Gyeongsang Natl Univ, Res Inst Nat Sci, Core Facil Ctr PhoOhemistry & Nanomat, Dept Chem BK21 FOUR, Jinju, South Korea

[4] Univ Southern Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA

[5] SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA

[6] ASML, 17075 Thornmint rd, San Diego, CA 92127 USA

来源：

CHEMICAL PHYSICS LETTERS | 2023年 / 833卷

关键词：

Infrared spectroscopy; Carbocations; Helium droplets; matrix assisted isolation spectroscopy; superfluids; ACETYLENE;

D O I：

10.1016/j.cplett.2023.140909

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ethynylium (C2H+) may be an important intermediate in astrochemistrybut remains poorly studied by laboratory techniques due to its high reactivity. Immersion of single acetylene molecules in helium nanodroplets followed by electron impact ionization effectively generates and isolates C2H+ cations in an inert cryogenic environment, enabling infrared spectroscopic measurements. We find that in the C-H stretching range, the C2H+ spectrum appears as a triplet with splitting of 33.6 cm-1 and 37.5 cm-1. The splitting is temporarily assigned to the product of interactions between the C-H stretching mode and overtones of the bending mode.

引用

页数：4

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