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生态友好的绝缘气体的真空紫外光化学:CF₃SO₂F

Bei Zou^1,2, Wei Liu³, Xiaoxiao Lin¹

¹Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China.

The journal of physical chemistry. A

|March 13, 2026

概括

三甲硫尼尔化物 (CF3SO2F) 光化学揭示其母离子是不稳定的. 详细描述了CF3+和SO2+离子的碎片化途径,CF3+的形成更为直接.

科学领域:

物理化学物理化学
摄影化学的使用.
质谱测量质量谱测量

背景情况:

三甲硫烯化物 (CF3SO2F) 是硫六化物 (SF6) 作为绝缘气体的环保替代品.
了解CF3SO2F的真空紫外线 (VUV) 光化学对于其应用和环境影响评估至关重要.
母离子 (CF3SO2F+) 的稳定性和碎片化途径是预测其在VUV辐射下的行为关键.

研究的目的:

为了研究CF3SO2F在11-14 eV能量范围内的VUV光化学.
阐明CF3SO2F+母离子的解离机制和能量.
为了全面理解,将实验结果与理论计算进行比较.

主要方法:

使用同步辐射光电化质谱法来分析光电化产品.
进行了高级理论计算,以确定电离能和潜在能量表面.
分析的重点是碎片离子的外观能量,特别是CF3+和SO2+.

主要成果:

CF3SO2F+母离子是不稳定的,并分裂成像CF3+,SO2+和SOF+这样的碎片离子.
结合A2A"状态的离子电离能 (AIE) 确定为12.65 eV.
对CF3+和SO2+的实验外观能量与激发状态的AIE保持一致,而不是较低的预测值.

结论:

CF3+片段通过直接的预分离途径形成,其中包括一个形交叉点.
SO2+碎片来自更复杂的多步骤路径,解释了其较低的强度.
这些发现澄清了CF3SO2F的VUV光解离机制,这对于其作为SF6替代品的使用至关重要.

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