Abstract
The influence of temperature and pressure on the dimerizationand decomposition of glycine under simulated hydrothermal system conditions was studied by injecting a glycine solutioninto water in the sub- and supercritical state. The experimentsat five different temperatures of supplied water – 250, 300, 350, 374, and 400 °C – were performed at 22.2 and 40.0 MPa. At 350 °C, experiments under 15.0–40.0 MPa were conducted. Diglycine, triglycine (trace), diketopiperazine,and an unidentified product with a high molecular mass (433 Da) were the main products of oligomerization. The results show thattemperature and pressure influence the extent of dimerizationand decomposition of glycine. The maximum of dimers formationwas observed at 350 and 375 °C at 22.2 and 40.0 MPa,respectively, and coincided with a high rate of glycine decomposition. Glycine, alanine, aspartic acid, as well as otheramino acids, were obtained by injecting a mixture of formaldehydeand ammonia. The results support the oligomerization and synthesis of amino acids in a submarine hydrothermal system.
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Alargov, D.K., Deguchi, S., Tsujii, K. et al. Reaction Behaviors of Glycine under Super- and Subcritical Water Conditions. Orig Life Evol Biosph 32, 1–12 (2002). https://doi.org/10.1023/A:1013906319253
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DOI: https://doi.org/10.1023/A:1013906319253