Four azoles with similar element percentages but different heterocyclic rings and functional groups are investigated with fs laser-induced breakdown spectroscopy (LIBS) as regards the influence of the interaction between the functional groups and heterocyclic rings on laser-induced plasma (LIP) emission. Temporally and spatially resolved measurements of the CN and C₂ emissions are obtained and analyzed. The functional group affects the π-electron delocalization of the heterocyclic ring and consequently changes the dissociation pathways of the heterocyclic ring. At the early stage, CN is formed from the atomic recombination or native fragments, while at the late stage, through the remaining native fragments. In the whole plasma lifetime, C₂ is mainly transformed from CN. Furthermore, dynamic CN and C₂ distributions mediated by the laser-induced shock waves are discussed.

中文翻译：

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分子结构对激光诱导等离子体杂环解离动力学和结构演化的影响

使用 fs 激光诱导击穿光谱 (LIBS) 研究了元素百分比相似但杂环和官能团不同的四种唑类化合物，研究了官能团和杂环之间相互作用对激光诱导等离子体 (LIP) 发射的影响。获得并分析了 CN 和 C ₂排放的时间和空间分辨测量值。官能团影响杂环的π-电子离域，从而改变杂环的解离途径。在早期，CN 由原子重组或天然碎片形成，而在后期，通过剩余的天然碎片形成。在整个等离子体寿命中，C ₂主要是从CN转化而来。此外，还讨论了由激光引起的冲击波介导的动态 CN 和 C ₂分布。