Photochemical Synthesis of Ammonia and Amino Acids from Nitrous Oxide
Photochemical Synthesis of Ammonia and Amino Acids from Nitrous Oxide
复制标题
一氧化二氮光化学合成氨和氨基酸
DOI：
10.1089/ast.2021.0064
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发表时间：
2022
期刊：
影响因子：
4.2
通讯作者：
Kitadai Norio
中科院分区：
文献类型：
--
作者：
Zang Xiaofeng;Ueno Yuichiro;Kitadai Norio
氨（NH3）和氨基酸的非生物合成对于生命的起源和早期进化非常重要。氨和有机氮物质可以由一氧化二氮（N2O）产生，一氧化二氮是大气中第二丰富的氮物质。在这里，我们报告了一个新的光化学实验和评估是否N2O可以作为氮源在大气中的益生元合成。我们进行了一系列的实验，通过使用的气体混合物的N2O+CO，N2O+CO2，或N2O + H2在液态水的存在下。结果表明，即使没有金属催化剂，N2O也可以通过光化学合成NH3，甲胺（CH3NH2）和一些氨基酸，如甘氨酸，丙氨酸和丝氨酸。NH_3不仅可以由CO + N_2O生成，也可以由H_2 + N_2O生成。以CH3NH2和CO2为原料合成甘氨酸，以N2O和CO为原料在紫外光照射下合成甘氨酸。我们的工作表明，第一次，N2O可能是一个重要的氮源，并提供了一个新的工艺合成氨和有机氮物种，这是以前没有考虑。因此，在讨论原始地球上的生命前化学时，应考虑N2O的有机合成的贡献。
Abiotic synthesis of ammonia (NH3) and amino acids is important for the origin of life and early evolution. Ammonia and organic nitrogen species may be produced from nitrous oxide (N2O), which is a second abundant nitrogen species in the atmosphere. Here, we report a new photochemical experiment and evaluate whether N2O can be used as a nitrogen source for prebiotic synthesis in the atmosphere. We conducted a series of experiments by using a gas mixture of N2O+CO, N2O+CO2, or N2O + H2in the presence of liquid water. The results demonstrate that NH3, methylamine (CH3NH2), and some amino acids such as glycine, alanine, and serine can be synthesized through photochemistry from N2O even without metal catalysts. NH3can be produced not only from CO + N2O, but also from H2+N2O. Glycine can be synthesized from CH3NH2and CO2, which can be produced from N2O and CO under ultraviolet irradiation. Our work demonstrates, for the first time, that N2O could be an important nitrogen source and provide a new process for synthesizing ammonia and organic nitrogen species, which has not been previously considered. The contribution of organic synthesis from N2O should, therefore, be considered when discussing the prebiotic chemistry on primitive Earth.