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在早期地球原始化学生命起源过程中,氨基酸是重要的必需的生物化合物,生成肽和蛋白.为了探究一个可能的新的氨基酸起源,采用密度泛函理论(B3LYP)在6-311++G(d,p)基组水平上研究了在星际媒介条件下在气相中和在模拟的冰颗粒表面上的化学反应:CH2NH分子和两个异构体分子HNC/HCN通过Strecker合成生成H2NCH2CN(氨基乙氰,一个重要的苷氨基酸前置分子).在研究体系中,CH2NH、HCN、HNC和H2O分子存在于星际密集分子云中,且早于地球广泛存在.研究证明,这些分子之间在星际媒介条件下和在冰颗粒表面上通过Strecker合成路线很容易生成H2NCH2CN.所以,H2NCH2CN分子在宇宙的星际密集分子云中是广泛存在的.还讨论了H2NCH2CN分子在新的氨基酸起源中所起的作用,以及在通过“原始汤”生命起源理论解析早期地球生命起源中可能所起的作用.
Amino acids are important biologically important compounds, peptides and proteins in the early life of primordial chemical origin of the earth.In order to explore a possible new origin of amino acids, density functional theory (B3LYP) d, p) at the base group level, chemical reactions in the gas phase and on simulated ice particle surfaces under interstellar conditions were investigated: CH2NH and two isomeric molecules HNC / HCN were synthesized by Strecker to form H2NCH2CN Cyanide, an important glycosyl amino acid precursor.) In the research system, CH2NH, HCN, HNC and H2O molecules exist in the interstellar dense molecular cloud and exist extensively before the Earth. Studies have shown that these molecules in the interstellar medium H2NCH2CN is easily generated by the Strecker synthesis route on the surface of ice particles.H2NCH2CN molecules are therefore widespread in the interstellar dense clouds of cosmic molecules.The role of H2NCH2CN molecules in the origin of new amino acids is also discussed, As well as the possible role in the analysis of the origins of early Earth life through the theory of the origin of life of the “original soup.”