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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >High-Energy Chemistry of Formamide: A Simpler Way for Nucleobase Formation
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High-Energy Chemistry of Formamide: A Simpler Way for Nucleobase Formation

机译：甲酰胺的高能化学：形成核碱基的简单方法

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摘要

The formation of nucleobases from formamide during a high-energy density event, i.e., the impact of an extraterrestrial body into the planetary atmosphere, was studied by irradiation of formamide ice and liquid samples with a high-power laser in the presence of potential catalysts. FTIR spectroscopy, time-resolved emission spectroscopy, and GC-MS were subsequently used to monitor the dissociation of this molecule into stable molecular fragments (HCN, H_2O, HNCO, H_2, CO, and NH_3) and unstable species (HNC, ?CN, and ?NH). The kinetic and thermodynamic models of the high-energy density event molecular dynamics have been suggested together with the reaction routes leading from the dissociation products to the nucleobases. In addition, using theoretical calculations, we propose a simple new reaction pathway for the formation of both pyrimidine and purine nucleobases involving ?CN radical chemistry.
机译：在存在潜在催化剂的情况下，通过用高功率激光对甲酰胺冰和液体样品进行辐照，研究了高能密度事件（即外星体对行星大气的影响）过程中由甲酰胺形成的核碱基。随后使用FTIR光谱，时间分辨发射光谱和GC-MS监测此分子解离成稳定的分子片段（HCN，H_2O，HNCO，H_2，CO和NH_3）和不稳定的物种（HNC，？CN，和？NH）。已经提出了高能量密度事件分子动力学的动力学和热力学模型，以及从解离产物到核碱基的反应路线。此外，使用理论计算，我们提出了一个简单的新反应途径，用于形成涉及？CN自由基化学的嘧啶和嘌呤核碱基。

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