Hydrogen cyanide (HCN) is considered a fundamental molecule in prebiotic chemistry experiments due to the fact that it could have an important role as raw material to form more complex molecules, as well as it could be an intermediate molecule in chemical reactions. However, the primitive scenarios in which this molecule might be available have been widely discussed. Hydrothermal systems have been considered as abiotic reactors and ideal niches for chemical evolution. Nevertheless, several experiments have shown that high temperatures and pressures could be adverse to the stability of organic molecules. Thus, it is necessary to carry out systematic experiments to study the synthesis, stability and fate of organic molecules in hydrothermal scenarios. In this work, we performed experiments focused on the stability and fate of HCN under a simple hydrothermal system scenario: the thermolysis of HCN at 100°C, at acidic and basic pH and in the presence of Mg-montmorillonite. Furthermore, we analysed the products from HCN thermolysis and highlighted the role of these chemical species as prebiotic molecules under a hydrothermal scenario.

中文翻译：

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氰化氢热解的实验研究：水热系统在化学演化中的作用

氰化氢 (HCN) 被认为是益生元化学实验中的基本分子，因为它可以作为原材料发挥重要作用，形成更复杂的分子，也可以作为化学反应的中间分子。然而，已经广泛讨论了这种分子可能可用的原始场景。热液系统被认为是非生物反应器和化学演化的理想场所。然而，一些实验表明，高温和高压可能不利于有机分子的稳定性。因此，有必要进行系统的实验来研究水热情景下有机分子的合成、稳定性和命运。在这项工作中，我们进行的实验侧重于 HCN 在简单的水热系统方案下的稳定性和命运：HCN 在 100°C、酸性和碱性 pH 值以及在 Mg-蒙脱石存在下的热解。此外，我们分析了 HCN 热解的产物，并强调了这些化学物质在水热情景下作为益生元分子的作用。