Conversions of nitriles in a solid phase at high pressures, combined with shear

Pakhomova, I. E.; Zhulin, V. M.; Gonikberg, M. G.; Иванов, В. П.

doi:10.1007/bf00854478

Cited by 3 publications

(3 citation statements)

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“…Earlier studies on HPT processing confirmed that such thermodynamic changes can move to different directions 19 such as decomposition of large molecules 22 or combination of small atoms to form larger molecules [22][23][24] even when the small atoms are thermodynamically immiscible 33 . For organic materials, classic studies also showed that decomposition or polymerization can occur under high pressure and high strain, depending on the material compositions, suggesting that the thermodynamic stabilities can be influenced in different directions in organic materials as well [14][15][16][17] .…”

Section: Discussionmentioning

confidence: 99%

“…1 b 13 . In the last century, scientists from the USA 14 , 15 and the USSR 16 , 17 applied the HPT method to some organic compounds and reported enhanced polymerization or depolymerization; however, these interesting studies were virtually overlooked later as discussed in a review paper 13 . The HPT method is currently used as a severe plastic deformation technique 18 , 19 for controlling the crystal size 12 , 20 and phase transformation 21 , 22 in inorganic materials.…”

Section: Introductionmentioning

confidence: 99%

“…1b 13 . In the last century, scientists from the USA 14,15 and the USSR 16,17 applied the HPT method to some organic compounds…”

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confidence: 99%

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Glycine amino acid transformation under impacts by small solar system bodies, simulated via high-pressure torsion method

Edalati

Taniguchi

Floriano

et al. 2022

Sci Rep

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Impacts by small solar system bodies (meteoroids, asteroids, comets and transitional objects) are characterized by a combination of energy dynamics and chemical modification on both terrestrial and small solar system bodies. In this context, the discovery of glycine amino acid in meteorites and comets has led to a hypothesis that impacts by astronomical bodies could contribute to delivery and polymerization of amino acids in the early Earth to generate proteins as essential molecules for life. Besides the possibility of abiotic polymerization of glycine, its decomposition by impacts could generate reactive groups to form other essential organic biomolecules. In this study, the high-pressure torsion (HPT) method, as a new platform for simulation of impacts by small solar system bodies, was applied to glycine. In comparison with high-pressure shock experiments, the HPT method simultaneously introduces high pressure and deformation strain. It was found that glycine was not polymerized in the experimental condition assayed, but partially decomposed to ethanol under pressures of 1 and 6 GPa and shear strains of < 120 m/m. The detection of ethanol implies the inherent availability of remaining nitrogen-containing groups, which can incorporate to the formation of other organic molecules at the impact site. In addition, this finding highlights a possibility of the origin of ethanol previously detected in comets.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Glycine amino acid transformation under impacts by small solar system bodies, simulated via high-pressure torsion method

Edalati

Taniguchi

Floriano

et al. 2022

Sci Rep

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High‐Pressure Torsion Processing of Serine and Glutamic Acid: Understanding Mechanochemical Behavior of Amino Acids under Astronomical Impacts

Edalati,

Hidalgo‐Jiménez,

Nguyen

et al. 2024

Adv Eng Mater

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Astronomical impacts by small solar system bodies (meteoroids, asteroids, comets, and transitional objects) are considered a mechanism for delivering amino acids and their polymerization to proteins in early Earth conditions. High‐pressure torsion (HPT) is a new methodology to simulate such impacts and clarify the behavior of biomolecules. In this study, two amino acids, crystalline L‐serine and L‐glutamic acid that were detected in meteorites, are processed by HPT and examined by ex situ X‐ray diffraction, Raman spectroscopy, nuclear magnetic resonance, Fourier transform infrared spectroscopy, and in situ mechanical shear testing. No polymerization, chemical reactions, or phase transformations are detected after HPT, indicating that the stability and presence of these two amino acids in meteorites are quite reasonable. However, some microstructural and mechanical changes like crystal size reduction to the nanometer level, crystal defect formation, lattice expansion by vacancy formation, and shear strength enhancement to the steady state are found which are similar to the behaviors reported in metals and ceramics after HPT processing.This article is protected by copyright. All rights reserved.

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