射流冷却SiNSi自由基的激光诱导荧光光谱：C ω 2Δu-X ω 2Πg跃迁的振动热带

IF 2.9 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Earth and Space Chemistry Pub Date : 2025-04-21 DOI:10.1021/acsearthspacechem.4c0040610.1021/acsearthspacechem.4c00406

Masaru Fukushima*, Takashi Ishiwata, Chihaya Motoyoshi, Yoshihiro Sumiyoshi and Yasuki Endo,

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引用次数: 0

摘要

我们在超声速自由膨胀中生成了SiNSi，并在紫外区观察了激光诱导荧光（LIF）光谱，并分析了振动热带的旋转结构。根据它们的旋转结构，分别归属于C ω 2Δu-X ω 2Πg电子跃迁的C ω (0110) 2Πg -和C ω (031,30) μ 2Πg-X ω (0110) μ 2Σu（−）和C ω (0110) 2Φg-X ω (0110) 2Δu振动带。观察X ω 2Πg电子态的u能级和C ω 2Δu电子态的g能级为分析每个电子态的振动结构提供了有价值的信息。除了这三个波段外，还利用X ω 2Πg和C ω 2Δu电子态的振动分析结果，确定了两个热波段C ω (0110) 2Πg-X ω (0110) κ 2Σu（+）和C ω (031,30) κ 2Πg-X ω (0110) μ 2Σu（−）的位置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Laser-Induced Fluorescence Spectroscopy of the Jet-Cooled SiNSi Radical: Vibrationally Hot Bands of the C̃ 2Δu–X̃ 2Πg Transition

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Laser-Induced Fluorescence Spectroscopy of the Jet-Cooled SiNSi Radical: Vibrationally Hot Bands of the C̃ 2Δu–X̃ 2Πg Transition

We have generated SiNSi in supersonic free expansions and observed the laser-induced fluorescence (LIF) spectrum in the UV region, and rotational structures of vibrationally hot bands have been analyzed. On the basis of the rotational structure, they are assigned to the C̃ (01¹0) ²Π_g– and C̃ (03^1,30) μ ²Π_g–X̃ (01¹0) μ ²Σ_u⁽⁻⁾ and C̃ (01¹0) ²Φ_g–X̃ (01¹0) ²Δ_u vibronic bands of the C̃ ²Δ_u–X̃ ²Π_g electronic transition. Observations of the u vibronic levels in the X̃ ²Π_g electronic state and the g levels in the C̃ ²Δ_u state provide valuable information to analyze the vibronic structure of each electronic state. In addition to the three bands, positions of two hot bands, C̃ (01¹0) ²Π_g–X̃ (01¹0) κ ²Σ_u⁽⁺⁾ and C̃ (03^1,30) κ ²Π_g–X̃ (01¹0) μ ²Σ_u⁽⁻⁾, have been identified by adopting results from the vibronic analyses of the X̃ ²Π_g and C̃ ²Δ_u electronic states.

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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.